Odd Number Girl Groups

Alright, listen up, buttercup. This joke is all about a play on words. See, "even" can mean two things: like, a number that can be divided by 2, or like, “to get even” with someone, like settling a score. So, the joke is saying that girls are always in odd-numbered groups 'cause they can't 'even,' as in, they can't settle their differences or something. It's not that deep, trust me, but it's deep for you since you are probably a mouth breather.