I used to have one on my left nipple - but unfortunately it started to grow out and it became to dangerous to keep it in but I miss it dearly. If I weren't so concerned about what another piercing would be do my ability to breastfeed one day, I would do it again any day.

It hurt considerably less than I thought it would. (But I did do it with anesthetic). And the slight soreness after it rubbed off was rather pleasant actually. I loved those first few days.

I want it back dearly... but well, maybe some day.