By possiblyoverweight - 08/11/2011 14:01 - United Kingdom
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To him, it doesn't matter. Just be happy that he is heading in the right direction
Men have nipples because both male and female embryos start out as female. As the baby grows, testosterone kicks in and he grows his junk. Nipples on men aren't biologically useful. And if a man lactates, it means he has mammary glands and he is most likely a hermaphrodite.
It's left over from early fetal development - at a certain point we were just a fetus with an undetermined gender, and then a flood of hormones came along in utero and told us what gender we were going to be. Nipples are a leftover from that time. Men do have mammary tissue, anyway. Just a tiny, tiny bit of it. (thank you google)