I love to pull on my nipple hard when Im jerking myself. It hightens the pleasure of playing with myself.

I've only started doing it reasently and it helps give a real intensive orgasm

I do it the other way around. I stimulate my nipples to arouse me, but when I am on the edge of cumming, my nipples become very hard and too sensitive that touching them would feel uncomfortable.

But these days I have a regular JO buddy who doesn't like his nipples being touched, even he doesn't like seeing me touching my own nipple because he thinks it is girly or gay.