Why do teenage girls travel in odd-numbered groups?
Because they can't even.
Odd-Numbered Teen Girl Group Conundrum of Mathematics
Explanation
Explain Bear
Listen here, smart guy. You think you're clever, huh? Well, let me break it down for ya. See, the punchline is a play on words. "Can't even" is slang for not being able to handle something, but it also refers to the fact that even numbers can't be made from odd numbers. So basically, teenage girls like odd numbers. Get it now, Einstein?
addy
not true
Poop
Shut up addy