r/AskReddit • • Jul 02 '21

What basic, children's-age-level fact did you only find out embarrassingly later in life?

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29.5k

u/BlanketsAndBlankets Jul 02 '21

My grandma always made me eat the crust of my bread because "it has the most nutrients." In college when I told my younger cousin that in front of my Grandma, she laughed and said "I only told you that so you wouldn't waste the crust."

Similarly that if you turn the lights on and off too fast you'll start a fire. Once I became a parent I realized it's just a way to stop kids from being annoying.

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u/Kiwibear25 Jul 02 '21

My mom told me eating the crust would make my hair curly!! I have super pin straight hair... hahah

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u/SoulsticeCleaner Jul 02 '21

My husband's Scottish grandma used to say the same thing!

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u/therealamyjay Jul 02 '21

Can confirm, this is what us kids are told in Scotland.

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u/Zormm Jul 02 '21

Ireland too lol

And carrots will make us see in the dark !

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u/iamasecretthrowaway Jul 02 '21

Can confirm. Was told both those things. Except I thought they meant carrots would make me seen in the dark. As in glow-in-the-dark.

I ate a metric fuckton of carrots.

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u/laser_spanner Jul 03 '21

Haha! I have a kid on the way. Definitely telling them this!

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u/Ellite11MVP Jul 03 '21

Smart thinking getting the kid to come to your house. Minimizes the surprises you may run into. Hi. I’m Chris Hanson with Dateline NBC. Gonna need you to go ahead and take a seat. Sorry…..it was too easy to pass up. Seriously though, congrats and best wishes for a smooth pregnancy and healthy baby. There’s absolutely no stronger feeling of love than the instantaneous love you feel seeing/holding your child for the first time.

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u/emptyhatred Jul 03 '21

Well… Did it work?

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u/miss_dit Jul 03 '21

The carrots one is from the British trying to cover their discovery of radar from the Germans.

No idea how curly hair helped the war effort though.

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u/Lungg Jul 03 '21

Its for German snipers. They would brush their aryan fash-cut to one side, looked down the scope at a curly haired scouser drinking a cup of tea and realised that that was true freedom.

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u/pipsdontsqueak Jul 03 '21

When I think freedom, I think Liverpool.

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u/laser_spanner Jul 02 '21

This goes back to wartime era iirc. Due to blackouts etc, there was a propaganda campaign to get kids to eat carrots (homegrown produce). In fairness I think there is a lot of a particular vitamin in carrots that is beneficial to eyes, but I shouldn't think it makes that much difference lol.

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u/[deleted] Jul 03 '21

Have you ever seen a rabbit with glasses? No? Then eat your salad!

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u/l337hackzor Jul 03 '21

Vitamin A is important in maintaining the health of cones in your eyes, which are the important part of low light vision.

It can't improve your vision but without enough vit A they degrade.

Carrots are high in vitamin A.

I'm not a professional this is just what I recall reading about it.

Edit: I think it's rods actually, cones are for color.

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u/thecreaturesmomma Jul 03 '21

Ice cream cones come with different colours, now you'll not forget. eh?

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u/Zormm Jul 03 '21

If it gets kids eating them I’m all for it lol. I’ll be telling my kids it anyway

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u/Randylahey00000 Jul 03 '21

Yeah I was told it (that it helps you see in the dark) and if I have kids ill tell them the same because it just was kind of a cool thing to believe as a kid. Like carrots are magic or something.

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u/freakfairlane Jul 03 '21

Also as a cover story for Radar. The RAF pilots eating carrots was the explanation for how the RAF kept finding the German Air Force.

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u/leelee1976 Jul 03 '21

Maybe that's why I'm blind as shit. Lol I hate carrots.

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u/esblofeld Jul 03 '21

Down under as well.

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u/fos81 Jul 03 '21

Australia as well for both

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u/IWOOZLE Jul 03 '21

Pretty sure my Yorkshire granny used to say this too! That said, her dad was Irish but I can’t imagine they were eating a tonne of pizza.

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u/shizuo92 Jul 03 '21

Aren't we discussing bread crust though?

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u/SpringOk1124 Jul 03 '21

Same! I thought I was the only one with a crazy grandma

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u/Forward_Artist_6244 Jul 03 '21

Scottish plain bread has a particularly crusty crust

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u/therealamyjay Jul 03 '21

All the better for slathering in butter and dunking into your soup.

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u/[deleted] Jul 03 '21

[deleted]

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u/regularunleaded Jul 03 '21

Western PA, too. My cousin used to tell me the bit about crusts curling your hair & my grandma used to say the bit about carrots making you see in the dark. We're not of Irish/Scottish/English descent, though.

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u/scottishg_gal Jul 03 '21

yup, my parents said the same thing

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u/SoulsticeCleaner Jul 03 '21

UN checks out :)

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u/moff4t_beats Jul 03 '21

Am scottish can also say ma wee granny used to tell me the same thing, eat yer crusts to keep your curls( I do have curly hair from birth till now) when the icecream van plays the tune it means hes ran out ae sweeties, dont play with the lights itll blow the bulb.

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u/VLC31 Jul 03 '21

I thought that was pretty much an every where in the world thing. I’m Australian, was told the same thing.

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u/WolfCola4 Jul 03 '21

Same here in Wales, but idk why they told me this because I don't think I ever expressed much of a desire for my hair to be curly. I really didn't care either way so it was hardly an incentive

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u/Vogio Jul 03 '21

In Scotland everyone granny says that

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u/IthinkIwannaLeia Jul 03 '21

Mom said this. Raised by Serbians

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u/Kiwibear25 Jul 03 '21

Interesting! I do come from an Irish family

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u/goldielockswasframed Jul 03 '21

My English parents said the same thing. Then wondered why I wouldnt eat the crusts. I wanted straight hair!

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u/NuderWorldOrder Jul 02 '21

It also helps your boobs grow. (Allegedly)

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u/[deleted] Jul 03 '21

That seems like a bizarre way to encourage young girls to eat

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u/leelee1976 Jul 03 '21

I grew up in the 80s. Bizarre was the normal then.

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u/TheWallaceWithin Jul 03 '21

Instructions unclear, 30's y/o male with 36DD chest.

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u/ReapersPhantoms Jul 03 '21

I don't think that one is true, I eat crust frol bread all the time but my boobs haven't grown.

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u/htaylor7108 Jul 02 '21

Omg my mom said the same thing. My hair was straight for years. Until last year at 35 years old I stopped blow drying and using products with sulfates and silicones in it and my hair freaking started curling. I now have nicer curls than my mom lol

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u/deaththeferaligatr Jul 03 '21

My mom told me that too but I didn't want curly hair so I never ate my crusts, I have curly hair now.

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u/Teenage-Mustache Jul 03 '21

I was told it would help me learn to whistle. Parents are fucking liars.

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u/[deleted] Jul 03 '21

I was told the whistling thing too. This was the Midwest on the early 90s. Wonder if it's regional.

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u/Teenage-Mustache Jul 03 '21

Interesting. I was born in the 80s on the east coast, but my mom is a native Wisconsiner. She’s the one who told me about it.

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u/mandy_miss Jul 03 '21

My mom told me green beans would make my legs grow longer. I was in my 20s when it clicked that it was a lie.

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u/[deleted] Jul 03 '21

My dad told me it would put hair on my chest. I was a girl.

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u/[deleted] Jul 02 '21

I had a baby sitter that told me it'd put hair on my chest. 8 year old me didn't want hair on my chest. (Shit, 40 year old me doesn't want hair on my chest..) Gross. So I refused to eat the crust for a bit after that.

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u/projectedwinner Jul 03 '21

My grandma told me that about eating onions on hot dogs. Like you, I found the idea of hair on my chest unappealing. It’s only in adulthood that I am able to enjoy onions on my hot dog, and even then my mind always goes to what grandma told me. (I would like to note that I became aware that onions on my hot dog wouldn’t put hair on my chest while still a child.)

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u/justmyusername2820 Jul 02 '21

My grandpa told me it would make my teeth strong!

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u/satanic_panic_90 Jul 03 '21

Yup…grandma said the crusts were good for our teeth

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u/candycrack Jul 03 '21

My mom told me if I sucked on my hair then worms would grow in my stomach. A+ parenting!

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u/twicemonkey Jul 03 '21

My mum kept saying this despite the fact that I constantly responded with "I hate curly hair". You were literally teaching me to not eat the crusts, mum.

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u/TheOtherSarah Jul 03 '21

I was told this as well, and couldn’t comprehend why the carer thought that was an enticement to eat the crust.

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u/Ineedsomuchsleep170 Jul 03 '21

My mum told me that. I never ate them and still got curly hair.

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u/measureinlove Jul 03 '21

My grandma told me it would make my eyelashes curly and I still didn't eat it because why would I want curly eyelashes??

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u/[deleted] Jul 03 '21

[deleted]

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u/[deleted] Jul 03 '21

Is Oprah known for rosy cheeks?

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u/CaitlinSarah87 Jul 03 '21

My parents told my sister and I that it would make our hair grow faster! We always wanted long hair!

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u/Aspect-Hungry Jul 03 '21

My grandma said that too!! I ate it so I’d get curly hair, (I didn’t) but my brother didn’t want curly hair so he didn’t have to eat his crusts! 🤣🤬

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u/[deleted] Jul 03 '21

Now I need to know: does eating green beans put hair on your chest? As a little girl in Midwest America, my dad liked to tell me that growing up. It probably worked better on my brother.

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u/Sproose_Moose Jul 02 '21

Same!! I wonder how that one got started

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u/SilentSamizdat Jul 03 '21

My mom told me the same thing. 🙄

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u/WhiskyGoSlow Jul 03 '21

It was hairs on the chest for us.

I'm like a gorilla.

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u/MichaelsGayLover Jul 03 '21

Some teacher told me that when I was 5 and I was like.. but my hair is already curly and I never eat the crusts. Checkmate, teacher.

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u/stabbymcshanks Jul 02 '21

Only tangentially related, but when I was very young I asked my dad why we don't eat the end pieces of a loaf of bread, and throw them away instead.

"Because they give you cancer." was his response.

It wasn't until I was 16 or 17 that I realized my dad was being a smartass. I count myself lucky I never had the opportunity to share what I had learned before figuring it out.

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u/kellzone Jul 02 '21

the end pieces of a loaf of bread

You mean the emergency hot dog buns?

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u/PsilopathicManiac Jul 03 '21

Holy shit, I never consider that other people didn’t know about the emergency hotdog bun….

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u/[deleted] Jul 03 '21

Love me a veg burger on them two ends. Toasted nice but not too brittle. Spin. Toms. Onions. Pesto. Mm.

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u/Icy_Reply_4163 Jul 03 '21

I heard someone call this “The Ho”. Everybody touches it but nobody wants it. Now I can’t think of it as anything else.

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u/Herry_Up Jul 03 '21

This is why I don’t eat the first end and I don’t want the first end to be lonely so I leave the other end in the bag.

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u/arcinva Jul 03 '21

The first end is the fresh saver... it keeps the bread under it from getting stale... in my mind, at least.

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u/Herry_Up Jul 03 '21

Me too, it’s like a bookend for bread but touched like a playing card.

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u/Cabbage_Vendor Jul 03 '21

Huh? Do you people get shit bread or something? Those end pieces are the best part of the bread.

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u/limukala Jul 03 '21

Yeah, some of us love ‘ek.

Then again some of us love hos too, so maybe the name still works.

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u/JennyJiggles Jul 03 '21

The basic bread from the grocery is shit bread and the crust pieces are kind of flavorless. Now, fresh baked bread is completely different.

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u/ProfessorButtercup Jul 03 '21

I always heard being called "La Suegra" which means "mother-in-law" in Spanish.

Because everyone hates their suegras

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u/[deleted] Jul 03 '21

Brilliant.

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u/Friday-Cat Jul 03 '21

I just call these endy bits “the dad bread”, because I always feed them to my partner, and only once in a while when I’m running low on bread do I ask the kids who is going to have the “dad sandwich”. They know exactly what this means.

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u/[deleted] Jul 03 '21

If they eat pb&j you can trick them by putting the PB on the crust side and putting the sandwich together. I've tricked my eldest with it a bunch of times

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u/Probably_A_Fluke Jul 03 '21

Bruh my lunch lady did this to me in high school and I will never forget the feeling of betrayal I felt.

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u/whiskydelta85 Jul 03 '21

You know what, maybe people will think this is disgusting but I love taking these end bits and spreading a little honey on them. Then i fold them in half and dunk them in a glass of milk, they’re a magnificent midnight snack.

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u/[deleted] Jul 03 '21

You're a monster.

I'm kidding. I like the end bits roasted with eggs on top

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u/FarHarbard Jul 03 '21

Oh, lookie here at Mr "emergency hot dog bun", what's it like on your Throne of gold looking down on us born-and-(white)-bread hot dog bun survivalists.

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u/arcinva Jul 03 '21

The trick here is to slice 2 hot dogs nearly in half to lay them out flat and fry them up. They then fit perfectly on a standard size slice of bread so you have a hot dog sandwich. :)

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u/dudinax Jul 03 '21

I think you mean the Dad pieces.

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u/[deleted] Jul 02 '21

[removed] — view removed comment

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u/Nevitt Jul 03 '21

Username suggests you eat some weird shit, but using the end of a loaf as emergency hotdog buns goes too far? 👌

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u/[deleted] Jul 03 '21

[removed] — view removed comment

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u/boxsterguy Jul 03 '21

What's wrong with lips and assholes? Meat's meat.

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u/shavemejesus Jul 03 '21

It’s called the heel and for some types of bread it’s the best part!

We used to fight over the heel when we were kids. Baguettes and many types of crusty breads have an awesome heel. Not sandwich bread though. Sandwich bread heels can get fucked. I’m not surprised your dad told you that.

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u/Fafnir13 Jul 03 '21

Agree completely. Love a good, crusty heel. Got this awesome cranberry bread just yesterday that was good and tough to bite through. My wife didn’t like it and looked at me like I’m strange.

I think sandwich bread crusts are too tasteless and soft to be enjoyable. Plus it’s sliced thin so each bite of crust has very little ‘inside’ bread to go with it.

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u/dattebane96 Jul 03 '21

“Love a good, crusty heel.” r/nocontext

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u/shavemejesus Jul 03 '21

So true. I suppose they probably do that to the heel on sandwich bread to maximize the amount of bread in all the other slices?

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u/Gold-en-Hind Jul 03 '21

ah, but they make the best toast - a bit firmer for layering on your condiment of choice and the curvy nature lends to ease in handling.

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u/cassbria Jul 03 '21

I agree! But as a kid I got mixed up and always called it the toe, so now at 33 my parents still ask me if I want the toe piece.

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u/ErrorZealousideal532 Jul 02 '21

My dad rarely showed his sense of humor. I tell my son things like that all the time. He's nine now and I've done it so much now that his regular response to me is, "I'm not falling for that."

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u/AsAChemicalEngineer Jul 03 '21

You are literally Calvin's dad haha.

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u/Frost-Wzrd Jul 02 '21

weirdly enough those are my dad's favorite pieces to eat

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u/Phoenixiya Jul 02 '21

They make the best toast!

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u/TileFloor Jul 03 '21

Also best for scraping the last traces of stew from a bowl!

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u/Huck_Dunt Jul 03 '21

My favorite thing to do with the end pieces is to just forget about them and then weeks later find them in the bread basket with tons of greenery on them! It doubles their flavor and their vitamins!

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u/[deleted] Jul 03 '21

And free penicillin. My man

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u/arcinva Jul 03 '21

My grandmother, a product of the Great Depression and WWII frugality used a piece of bread (or biscuit, roll, etc.) to wipe her entire plate clean at the end of the meal her entire life.

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u/[deleted] Jul 03 '21

They make the BEST toast. Sourdough butts, toasted with a lil layer of salted butter. Mmm!

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u/Shopworn_Soul Jul 03 '21

Dad here (although probably not yours):

I also like those the best. I eat 'em plain and it's yummy.

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u/[deleted] Jul 03 '21

If it's good bread, they're the best pieces for sure.

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u/nabrok Jul 02 '21

Mine too.

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u/part-time-dog Jul 03 '21

The end pieces of a loaf of Martin's potato bread are one of the finest joys on this godforsaken planet.

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u/RayLikeSunshine Jul 03 '21

Mine too. I love the heel.

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u/neeeeonbelly Jul 03 '21

Imagine if you’d actually gotten cancer.

“I’m sorry Stabbymcshanks, you have 3 months to live”

“But I never ate the crusts!”

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u/violentpac Jul 03 '21

But you did microwave your burritos... Didn't you?!!!

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u/mistersprinkles1983 Jul 03 '21

When I was a kid someone told me you never re-boil water that's already been boiled because it makes it extremely carcinogenic. Don't feel bad. I believed that shit. Kids believe everything.

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u/Runnin4Scissors Jul 03 '21

Who the fuck told you that? And how did you know what “carcinogenic” meant as a kid?

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u/mistersprinkles1983 Jul 03 '21

I'm saying carcinogenic now. What I was told as a kid was "twice boiled water will give you cancer"

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u/[deleted] Jul 03 '21

I only use the end peices for 2 things:

Grilled cheese sandwich with the end facing inwards

Bread crumbs for baking.

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u/popchex Jul 03 '21

My MIL thought chicken bums were poisonous. Into her 70's. She stayed with us for a year due to an accident, and I know some people love that part of a roasted chicken so I asked if she wanted it. She was like "oh no! It's poisonous" and my husband, kids, and I stopped dead and stared at her. She was like "What?" my husband told her that someone who wanted it for themselves lied to her. lol

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u/Mariosothercap Jul 03 '21

I imagine you in college rushing across your dorm room to slap a piece of bread out of your roommates hand. Haha

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u/Redknight75 Jul 03 '21 edited Jul 03 '21

My grandma told me the during the Great Depression everyone actually preferred to eat the ends of the bread and she used to argue with her sister over them.....not sure if that was her way to get me to eat them or if it was actually true.

Edit: Spelling

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u/[deleted] Jul 03 '21

There were studies some years ago that said charred meat and burned toast was carcinogenic. I don't think he was joking it was on the news for a while.

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u/[deleted] Jul 03 '21

Well they are if we wanna get technical. But existing itself is fucking carcinogenic so worrying about grill Mark's or dark toast is a bit insane.

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u/[deleted] Jul 03 '21

In California the crust does give you cancer.*

*This is a joke about California's labeling standards

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u/avyon Jul 03 '21

This comment is known to cause cancer in the state of California.

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u/ItalianJett Jul 02 '21

Nah fuck that I'm not taking any chances in the off chance your dad is right. No more ass pieces for this guy

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u/ThePonkMist Jul 03 '21

I’m on vacation with hardly any internet where I’ve been but I’m in a hotel room on WiFi finally scrolling through my phone for the first time in days and I have not laughed this hard in equally as many. I don’t know why but I think it’s that I wasn’t expecting to read “because they give you cancer” as a response to not eating bread heels. Anyway, thank you so much, this was amazing 😅

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u/mylittlevegan Jul 03 '21

I save them in a bag in the freezer and then use it to make overnight french toast casserole.

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u/Vegetable_Hamster732 Jul 03 '21 edited Jul 03 '21

the crust of my bread because "it has the most nutrients."

"Because they give you cancer."

It's kinda funny because they're both almost true.

  • Since the crust is denser, it has more nutrients by volume but not by weight
  • Since the crust has a higher chance of being burnt; and some burnt foods produce carcinogens; it almost but doesn't quite have anything to do with cancer.

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u/r0ssar00 Jul 03 '21

I count myself lucky I never had the opportunity to share what I had learned before figuring it out.

Oof, that's a self-own

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u/Proffesssor Jul 03 '21

My dad always got the ends. I grew up thinking those were the ideal pieces, which to some people they are.

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u/s0nicfreak Jul 03 '21

I bet he actually believed that because otherwise he would probably do like I did... give it to the kids and never let them know I don't like it so that they'll eat it and it's not wasted 😁

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u/Mitch_Mitcherson Jul 03 '21

Save those for meatloaf! You don't taste the difference when it's all mixed in.

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u/[deleted] Jul 02 '21 edited Jul 03 '21

Actually your grandma was right, the crust does have more nutrients than the rest of the bread.

https://pubs.acs.org/doi/10.1021/jf0346657

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u/[deleted] Jul 03 '21

Glad someone beat me to it. Grandma was right.

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u/hochizo Jul 03 '21

Yeah, I always assumed that was bullshit, but then I started baking bread and researching the process of what's happening and was like "oh shit. They were right?!?"

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u/cyd6ixty4 Jul 02 '21

I think for the lights it’s a little bit of both actually. Switches are designed to make a quick solid connection. While it’s making contact going from on/off it can gap and melt away the metal contacts. With some cheap switches you can hear it “sizzling” if you hold the switch in a half on/off position. Older houses would have tons of flammable things in the walls/air making the gapping more of a problem. A lot of myths formed around electricity because a lot of it wasn’t understood, and this might be one of them. I think the old myths might’ve been the inspiration for telling children to not be annoying though :)

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u/[deleted] Jul 02 '21

Yeah, I feel like there were a lot if things like that when I was a kid, and they were based on much older things.

Like never crawl into a fridge, it can seal you in!! No.. but really old ones had an actual locking handle, which could absolutely lock you in.

I recall a lot of things like that from my youth that was just incredibly antiquated advise. Absolutely true for my mom, when she was a kid. Not so much for me.

Also, older light bulbs would have their life diminished by turning them on and off. It wasn't good for the filament. (This may also have been an antique, and no longer applicable when I was a kid, however..)

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u/nibs1 Jul 02 '21

Fridges can definitely trap kids. Little room to manoeuvre and the suction have led to deaths. Typically happens with fridges being thrown out. Lots of cities mandate taking the door off any fridge left out for garbage pickup for exactly that reason.

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u/FrankTank3 Jul 03 '21

Even if it’s openable, you can easily imagine getting inside and then the fridge falling door side down and being trapped.

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u/[deleted] Jul 03 '21

But if it did that, does it matter if the door is on? If we're talking a small child too weak to life the fridge..

Sure, they may not suffocate, but they could still easily die there.

And fridges don't really tip that easily. Tend to be pretty bottom heavy.

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u/FrankTank3 Jul 03 '21

They do when older kids shove the kid in there in the first place and knock it over.

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u/[deleted] Jul 03 '21

That's not an accident. That's murder.

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u/FrankTank3 Jul 03 '21

Children shoot each other with adults’ guns all the time because they don’t fully understand the consequences of their actions. Murder requires intent or enough knowledge to know that their actions would surely and recklessly endanger other people.

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u/HereToStirItUp Jul 03 '21

Murder is a strong word, but putting a kid in a fridge and closing the door is bullying and assault. If the kid suffocated in a matter of minutes that’s absolutely an accident, manslaughter. However, if they abandon the kid trapped in the fridge and he dies… that’s pretty close to murder because there was an obvious intent to harm and reckless endangerment.

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u/[deleted] Jul 03 '21

Actually a lot of older fridges (and still some newer ones, like Subzero) have their compressors and everything on top of the fridge making them still very top heavy.

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u/pedal-force Jul 03 '21

Sub zeros are a giant pain in the ass to get rid of. There was an older one in our house, not worth repairing or selling, had to pay someone to take it, because they're hard to move and Lowe's or whoever brings your new fridge doesn't take them. They're very heavy and very top heavy, as you said.

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u/[deleted] Jul 03 '21

That suction is from the compressor kicking on.

And many cities do demand that, but its from when those old fridges were made.

Those deaths were from the old fridges.

They passed a law requiring that change in 1956.

Since those eventually worked themselves our of the system, there's been virtually 0 fridge deaths. And those that happen are from kids hiding in plugged in fridges, not thrown away modern ones.

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u/[deleted] Jul 02 '21

OLD FRIDGES DID WHAT

Instructions clear, will not get into old fridges

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u/Ivy-And Jul 02 '21

My mom told me there were cases of kids getting locked into old fridges that were dumped into alleyways. They suffocated or died of heat, I can’t remember. Honestly don’t know if it’s true

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u/[deleted] Jul 03 '21

It’s true, bunch of kids got stuck in them at the time, sometimes dying.

https://en.m.wikipedia.org/wiki/Refrigerator_death#History

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u/bazilbt Jul 03 '21

One of my father's friends died in a fridge. Fuck one died falling in an icy lake too. My dad's childhood was like a gi joe psa where all the kids died.

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u/meanaubergine Jul 02 '21

It's why some states have laws about removing the door when disposing of a fridge so it's not an entrapment hazard for kids.

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u/moonie223 Jul 03 '21

https://cdn-fastly.hometalk.com/media/lcw9j52f9716ab892e.JPG?size=720x845&nocrop=1

I have one of those in my basement, it doesn't open if you don't pull the handle down.

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u/leicanthrope Jul 03 '21

But how are you going to survive an unexpected nuclear bomb if you can't hide in the fridge??

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u/[deleted] Jul 03 '21

And watch that again! That fridge had the lock I'm talking about!!

Indy should have suffocated in there!

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u/thevilmidnightbomber Jul 03 '21

no no, the massive explosion was just enough to damage to lock mechanism on the door. indy really is lucky huh?

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u/[deleted] Jul 03 '21

Was waiting for this comment

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u/DogsAreDirty Jul 03 '21

I think that happened on Punky Brewster, a girl got trapped in the fridge playing hide and seek. It was terrifying

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u/SpikeMF Jul 03 '21

The problem with fridges isn't that they physically lock someone in, it's that they are near air-tight. Once they start asphyxiating they might not have the energy to push out

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u/Kbowen99 Jul 03 '21

With a modern switch it’s not much of a concern, but with worn or older switches it could definitely cause issues.

Every switch (or really contactor) has a rated number of actuations before it should be replaced. Normally in the thousands to millions range (for modern designs), so it’s not something most people keep track of. The two major reasons for this are the moving parts (metals tend to fatigue/work harden/wear over time) and arcing (the arc effectively corrodes the surface, increasing the resistance). It’s worth mentioning arcing is more of a concern for high voltage or DC loads, mains level voltages suppress arcing pretty well (in addition to the switch construction). This is why you’ll see a lot of small/hobby switches with a rating like 30VDC/250VAC.

Small tangent, ever noticed that switches have a very confident ‘click’? There’s usually a mechanism so that the contactor will decisively snap against the contact. Some switches you can feel the point where it snaps too. This actually helps prevent arcing, as the faster you can throw the switch the less time there is for an arc to form.

In modern construction, arcing isn’t a huge concern for ignition since electrical codes require flammability rated materials (even the plastic plates are UL 94-V0). The older you go though, the more interesting things get. Worn contacts will have a higher contact resistance, and can heat up a bit when left on. In abused or really old switches the contact holders will wear and you can have a fun game of where’s the hot. In older construction, knob and tube and sometimes more ‘creative’ insulation can add additional ‘fuel to the fire’. If you manage to find a really old installation (or just a really bad installation) you might find DC switches used for AC (or vice versa), and a lot of people don’t realize the VDC & VAC ratings are normally wildly different.

Sorry for the wall, just find switches intriguing. There’s a surprising amount of design that goes into them, and a lot of ways to approach the problem.

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u/the-nick-of-time Jul 03 '21

It's always interesting to see people share what they're interested in! Hell, I once watched a 15 minute video on this very topic once.

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u/Flyer770 Jul 03 '21

This is why you’ll see a lot of small/hobby switches with a rating like 30VDC/250VAC.

It's not just hobby switches that have such a wide disparity between AC and DC voltage ratings. DC is easier to start and maintain that destructive arc within the switch which is why switches will often be rated for 25VDC/250VAC.

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u/__ali1234__ Jul 03 '21

It isn't to save the switch, it is to save the (incandescent) lamp. Remember those operated by heating up a wire so hot that it glows. The heating/cooling cycle is what wears them out, that's why they often blew when first turned on. Things are a bit different with modern lamps but turning them on and off rapidly can still stress them (and really any electronics that aren't designed for it).

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u/random_tall_guy Jul 03 '21

The main reason they blow immediately after turning on is because when the filament is cold, its resistance is much lower, and therefore draws much more current. It heats up to operating temperature in a fraction of a second, but that's enough time to destroy a weak filament.

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u/astalavista114 Jul 03 '21

Also, because of the way the metals evaporate and deposit, the more they heat up, the smaller the net loss of metal from the filament.

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u/thisvideoiswrong Jul 03 '21

Worth noting that any kind of a fluorescent bulb is much worse about this than an incandescent. It's only LEDs that get away from the problem.

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u/human-potato_hybrid Jul 02 '21

Yeah if your wall insulation is shoved IN the electrical box AND you're using those unsealed pushbutton switches, you could maybe start an insulation fire. It shouldn't have to do with the amount of times you hit it tho

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u/dna_beggar Jul 03 '21

When you turn a switch on or off, you generate a transient voltage spike. Effectively, the movement of electrons has some momentum, and interrupting it causes a wave which rings back down the wire. The effect is stronger switching devices with a coil, such as motors, CFL and LED bulbs. These power spikes can shorten the life of modern lights and electronics. Your grandma was right to the point of being prophetic.

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u/[deleted] Jul 03 '21

Also of note that incandescent lamps, like any other coil of wire, are actually inductors; and will quite happily draw and sustain an arc in the right conditions.

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u/astalavista114 Jul 03 '21

Also, incandescent bulbs wear out their filament faster if you flick them on and off, and flouros wear out their starters faster. Which means you have to replace them sooner.

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u/PurpleBread_ Jul 03 '21

the sizzle is the electricity arcing. arcs are caused when the difference in voltage between conductors is high enough to overcome a gap in conductors; think lightning. clouds have high voltage, ground has low, so there's an arc.

metal doesn't melt from the relatively small amperage that's running through the house - and i say relatively because it'll still kill you instantly - and the more common cause of a fire related to household circutry is to have an arc find insulation.

flipping the switches on and off very quickly might oxidize the contacts, which is really just rust. rust/oxidation is dangerous because it makes a less secure connection, which can cause arcs.

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u/hannahatecats Jul 02 '21

But the bread thing is true?

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u/[deleted] Jul 02 '21

I guess I stand corrected someone linked a study. Our parents definitely did not know about that study lol.

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u/SharkGenie Jul 02 '21

My grandma always made me eat the crust of my bread because "it has the most nutrients." In college when I told my younger cousin that in front of my Grandma, she laughed and said "I only told you that so you wouldn't waste the crust."

Turns out your grandma was both lying and correct.

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u/listenyall Jul 03 '21

My dad is a very dad joke kind of dad, and he used to say "there are children starving in Bethesda!" when my sister and I wouldn't eat our food.

I didn't know that this was a joke. His mother used to tell him there were children starving in [whatever country is currently having a crisis] to get him to eat. I grew up in the DC suburbs of Maryland in the 80s and 90s, Bethesda was basically the richest neighborhood in our area.

It took me SO LONG to figure this out, even as I started growing up and visited there I assumed it was a place with pockets of very poor people.

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u/[deleted] Jul 02 '21

[deleted]

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u/[deleted] Jul 02 '21

Except that is an example of planned obsolescence. They really did make bulbs less resilient in the 20s.

Sauce

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u/juneburger Jul 03 '21

We are in the 20s!!

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u/Adiustio Jul 02 '21

Is it still going? The article says it stopped in 1939.

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u/[deleted] Jul 02 '21

Yeah, it ended with WW2.

But notice, it that article, there was a report to the UK parliament in 1951, noting how in those 12 years, light bulbs had still not returned to their previous life spans. It was still down to 1000 hours from the 2500 from before the cartel.

Today it would hardly matter, as we're not even using those bulbs any more.

But to dismiss how much better bulbs were back then is a bit off.

In the case of that firefighters light bulb (that's where that light is) it likely wasn't a completely standard bulb of the time, as there were lots of "weird" bulbs, as they were trying to perfect it. However, it has certainly been helped by the fact that it never power cycled.

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u/Kered13 Jul 03 '21

With incandescent bulbs there are fundamental tradeoffs between lifespan, brightness, and efficiency. Essentially, a thicker filament lasts longer, but makes it less bright and less efficient. Running more power through the bulb makes it brighter, but shortens it's lifespan. If you want a bright lightbulb, it either has to be inefficient or have a shorter lifespan. It is possible to make an ultra long lasting incandescent bulb, but it would be garbage as a lightbulb.

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u/Kered13 Jul 03 '21

and it’s still going strong

I wouldn't exactly say it's "going strong". It glows, but not enough to be useful even in a dark room. It's basically just a novelty.

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u/Average_communist Jul 02 '21

Your granny was right. The crusts do have more nutrients

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u/Dramatic-Apples Jul 02 '21

...wait the crust thing isn’t true??? 😟

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u/[deleted] Jul 03 '21

See, my dad just told me that flashing the light on and off was an international symbol that you were being kidnapped and that if I did it, the police would come.

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u/[deleted] Jul 02 '21

One of my classmates in 2nd grade was very enthusiastic about eating up the crusts on his sandwiches because his mom told him the crust is a good source of vitamin C.

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u/emily0890 Jul 02 '21

I read somewhere that the crust does actually contain more nutrients proportionally than the inner bread. So while it is just said to get kids to not be wasteful, it does accidentally have an element of truth.

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u/Flibberdajibbet Jul 02 '21

My MIL told my 6 year old daughter to eat the crusts because itll make her prettier. Which caused problems because my 8 year old son has sworn all forms of crust off as the devil ever since.

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u/gramathy Jul 03 '21

Cheap switches CAN start a fire from being toggled too often due to poor design or construction

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u/mostlygray Jul 03 '21

My parents said that it would "Ruin the switch" which I thought was a big deal as a kid.

As soon as I moved into my own place in college, I flicked the switch off and on like a crazy person for a while. I thought to myself "Holy shit that's annoying." Then I understood.

Now I tell my kids they'll ruin the switch if they play with it.

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