Do people with three (or more) nipples have superpowers? Apparently, yes.
While I may not know exactly what they are, there are those who do. Case in point, a Swedish animator named Tobbe Andersson knows enough to publish this sketch:
Nippleman! Using the power of three nipples to fight the forces of evil! Superfluous nipple, activate!
I'm not sure about the moustache or the pot belly. I don't think he's going to get a lot of action with the ladies, but I would have said the same about Ron Jeremy.