Why would you need two? There was only one Hay-Seuss wasn't there?
And especially for guys... Everyone knows they only get one nipple pierced. After they find out how much it hurts they don't want to do the other side. Ha, ha I guess.
Huh?
@FrostyJim
That's a story from the wife of a friend. She had a very successful nail salon in the Seattle area until she got driven out of business by Asian immigrant competition. Then she opened a tattoo/piercing parlor (frankly, I wouldn't let her anywhere near my body to make any permanent mark. I wouldn't trust her enough. )
She said it was amazing how common it was for guys to came in to get both nipples pierced but then decide not to get the 2nd side done -- when they found out how painful the first one was. Ha, ha. I guess.