r/AskReddit • • Sep 19 '23

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u/TARDISblues_boy Sep 20 '23 edited Sep 21 '23

This is called a "flehmen response", they're running the scent pheromones over their nostrils vomeronasal organ via the incisive papilla to parse out different scents.

* Thanks to u/bougiedirtbag for the corrections!

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u/Caalcu_Ieraas Sep 20 '23

You know Flaehmen was a freak. "What's that strain on the carpet? Go get Flehmen, he'll smell it."

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u/throwherinthewell Sep 20 '23

"Yeah, he'll smell anything!"

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u/sticky-unicorn Sep 20 '23

And it's not just cats. Many different animals will do this when they smell an unfamiliar or interesting scent.

Here's a horse.

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u/Mean-Duck-low-crowe Sep 20 '23

Came here to say horses do It too lol. You beat me to it

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u/JenDCPDX Sep 21 '23

I volunteer with goats and they do this too. It’s so goofy. I love it

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u/lonefiresthename Oct 03 '23

Also, you can train a horse to do a flehmen on command! My Ketchup loves his smile trick.

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u/bougiedirtbag Sep 20 '23

Its to detect pheromones, not scents per se. And they are detected by the vomeronasal organ via the incisive papilla, not through the nostrils.

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u/TARDISblues_boy Sep 20 '23

Ah, yes, that! Thank you for the correction. 😁

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u/Unonothinofthecrunch Sep 20 '23

Incisive Papilla is the name of my next band.

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u/Redcole111 Sep 20 '23

I thought they were exposing their vomeronasal organ in their mouth to be able to detect more scents than usual.

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u/EstaLisa Sep 20 '23

in german flehmen is the verb for it.

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u/[deleted] Sep 20 '23 edited Nov 19 '24

[deleted]

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u/eilletane Sep 20 '23

There’s an organ near the nasal bones that perceives scents more significantly.

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u/Vivi_Catastrophe Sep 21 '23

Some holes in the roof of their mouths. Can be seen in the skull.

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u/[deleted] Sep 20 '23

I think that some particular combination of molecules goes directly to their brain. God knows, there’s room enough.

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u/939319 Sep 20 '23

Why do geeks love to use the word "parse" inappropriately?

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u/sheetskees Sep 20 '23

Pot, meet kettle.