A friend of my brothers wanted a nipple piercing as well, he wasn't a firefighter or anything mind you, but when they pulled that needle out and stabbed him, he passed out and woke up with four of us standing there laughing at the fact that he just pee'd himself while out cold, LOL!!!
It's not for everyone I guess. PLUS, when people tell you a tattoo or piercing didn't hurt....THEIR LYING!, the brain just forgets how intense the pain was after awhile and you think to yourself "that wasn't that bad". HA! Just wait until it gets really really cold outside, those nipple rings can get pretty chilly!