Male Nipples
1) They do generate pleasure for the man. I'll attest to that as well as the first article below.
2) They are ornamental. Although as with all art, beauty is in the eye of the beholder. And evolutionists routinely deny that anything is ornamental.
3) They are a design feature inherent in the way humans develop where the same tissues can develop into either sex based on hormones.
Why men have nipples(put cursor on pic to see man without nipples)"
Straight Dope on Nipples
Don't mess with my nipples. I like them. And I like them better when a woman kisses them or drapes her hair across them.
Your third answer is a tautology. If you need the question rephrased, here it is: Why are male nipples a design feature inherent in the way humans develop where the same tissues can develop into either sex based on hormones?
So, I take it your answer is: Men have nipples so that women can kiss them.
Interesting!
You are such a brazen liar. Ever hear of "sexual selection?" Of course you have, but you oh-so-conveniently forget it to make a dishonest point. Everything from peacock tails to elk antler to blonde hair is "ornamental" but also serves to attract mates.
As for external ornamentation, one need look no further than crows and certain crustaceans as examples of critters collecting do-dads or ornamenting themselves to attract mates.
I suppose you've never heard or used the pick-up line, "want to come up and see my etchings?" Same deal.