why do men have nipples?

We have them, because they were left there after we evolved from females. Which is why males are the superior species of human. haha jk female ibyers :P (see more)

we have nipples because.....it would be weird if we didnt have them.....seriously and they're useful for telling us if something is pressing up against us...sorta like a crappy spider sense thing if that makes sense (see more)