why exactly do guys have nipples? haha
I asked this thing called chacha that and they are supposed to know everything and it said that guys and girls look the same the first few weeks in the fetus, then they start to devolope male and female parts. So I don't know...
Lol I actilly read a book on it .. When your in the womb you start growing boobs before your gender is decided so when the guy gene shows up you stop growing boobs and just have nipples lol
Every embryo is defaulted as a girl, so the nipples develop, then after so many weeks you start to grow everything you need to be a man.
becasue we all came from a common ancestor and it's just a trait that everyone has but not everyone uses, like your appendix