Why do male Humans have nipples?
It seems other Great Ape's -like Gorilla- males have nipples,... Why?
Nipples -and more so breasts- are a pure mammal thing unlest I am mistaken,.... so.....
... are there other mammal species where the males have nipples or not functional breasts?
It is a known fact that some male humans can lactate.
May it be a still under-construction Darwinian Biology Great Ape strategy for feeding the kids?