Why do guys have nipples?

Question

they have no purpose

Answer 1

Male foetuses begin as physically female. At 6wks gestation a surge of hormones activates the y chromosome and they begin to develop as male.  Unfortunately nipples have already developed, but males have much less breast tissue and no milk ducts as these develop after 6 weeks.  If the surge of hormones never happens the baby develops as physcially female but genetically male.  You would never be able to tell these from any other woman, but they cannot bear children.

Answer 2

well all embryo's begin female so the stoy is they all devolop nipples then males lose the bit of XX after the nipples have devoloped so they keep them.....forevermore

Answer 3

yeah they have a purpose...so we can play with them...duh...lol!