And once again a simple Google search on 'Male Nipples' reveals how stoopid mankind really is, Page after page on 'Why do men have nipples?'
Simple answer: because women do.
In the womb we all start out with the same template. After a few weeks our sexual differences become apparent - what become ovaries for women, turn into testicles for men etc etc ... what become nipples for women turn into ... well, they turn into nipples for men.
What isn't as well spelled out is that men get off on nipple stimulation just as much as women do.
Me? I discovered very early on that my nips were hot-wired to my dick and ass. After years of serious nip play (clamps, pumps, weights, piercing ... yeah!) I just keep falling in love with tit play more and more.
I went shopping with a friend of mine who's in to really serious tit play. He bought some new 'dial-up' clamps and was seriously pissed off to discover that he couldn't fit them over his hugely bloated tits.
It wasn't a total loss, tho - he gave them to me ...
To get the full benefit out of your man-nips, you've gotta exercise 'em - and it helps to have a work-out buddy! Rub 'em, lick 'em, then go on to light squeezing, pinching, nibbling ...
Increase the pressure of this play then try clamps - adjustable pressure ones are good to start with.
After a while you'll find find you can abuse the shit out the little fuckers and it'll just get better and better!