By the way, I found this out in a game of Trivial Pursuit. 5 of 6 people found this comment helpful. 6 of 9 people found this comment helpful. 4 of 6 people found this comment helpful. As for multiple nipples.
Humans usually end up that way as a result of some animal gene.
After all, female mammals have a line of nipples down their fronts, so why shouldn't humans. 1 of 4 people found this comment helpful. 2 of 7 people found this comment helpful.