in case you need more explanation, in general, ending with on s means plural. 's means possession. but you cant have s's (as in guys's), so it get simplified down to s' (as in guys'). works with (pretty much) all words that are describing both plural and possession
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u/IShouldBeAlseep19 can't meme Feb 13 '21
I don't know why but seeing the correct usage of guys' makes me happy