Mr. Black said:
I got one done 5 years ago. hurt like a mofo. I just about passed out the first time i twirled it to clean. Honestly I think it took about 2 years to completely heal. There's definitely an increased in sensitivity and most chicks seem to like it which is good. Beware though...depending on the shape of your nipple, it can distort it quite badly, therefore if you ever want to remove it your nipple will look pretty funny.