Why in the world do guys have nipples?

Question

I'm looking for a scientific answer. Not a sick one, please.

Answer 1

In the very first stages of embryonary development, both sexes grow the same organs until they resolve the difference by growing one and leaving underdeveloped the same for the other sex. That's why penis and clytoris have the same origin, but they develope as different organs.

Answer 2

There actually isn't a concrete answer for this one, but there are many theories:

one is that men used to have milk producing organs just like women in order to help raise the children, but we evolved out of those and our nipples are slowly evolving away as well.

Another (more likely) theory is that every child is the same gender at one point during the prenatal period, even though, genetically it is already one or the other. Male and female attributes come along just a little later and you get a boy or girl, but for some time, the baby is both and grows nipples "in case" it is a girl, but if it is a boy, they don't just go away.

I hope I've helped.

Answer 3

When children develop in the womb they are at first ALL the same; the Y chromosome in males makes the testes form, which produce testosterone and inhibit further development of female systems. Guys have nipples because we all start out the same.

Answer 4

Because they were female in the womb before a certain hormone triggered their growth into males.... no wait. I just realized it was the other way around - that's why women have clits.