I like showing off my big nipples. When fully erect all of the nipple stands up like a bullet with almost no flat areola. Sort of lewd.
I have one admirer at the gym who stares at them openly. His own nips are no bigger than small flat buttons. In comparison, mine look like child rearing teats. I am often tempted to bring in some heavily weighted clamps and show off my nip strrength. See how he'd react to seeing me swing those weights and flex my pecs.
Besides size, my nipples are extreme in sensitivity for a male. Whenever my seat belt rubs against one the sensations are intense. When the tips rub against a tank top in the gym while doing flyers, it makes me hard and sometimes leak. When I was young I could ejaculate off nipples after an hour without touching my penis at all. it was a powerful orgasm.
Send me a private message if this gets you going. Like sharing experiences with nip men.