Question

Why do animals have nipples?

Answer 1

Many male mammals, humans included, have nipples. Scientists believe that the reason behind this is the result of natural genetic selection –- or lack thereof. Male and female animals start out life almost identical in utero, complete with nipples.

Answer 2

For female animals, it is to feed their children ( like human babies ). For males, however, it is believed that it is because in the womb every animals starts off as a female ( The same as human babies ) and once given male parts the nipples don't really leave. ( Sorry if this doesn't make sense )