JBleak, I love your tattoo.
Paulrus has passed along some important information.
On a serious note, I have a co-worker who has tattoos and a pierced tongue. My dentist said that pierced tongues are prone to infection and that the metal ball in one's mouth scrapes against your teeth and erodes the enamel. I had also read that. My co-worker has terrible teeth. She's had a few pulled and the remaining teeth look really bad. She has gum infections and I have really encouraged her to see a dentist. She did go to a nearby dental clinic and the people there told her that her enamel has been scraped away on her top teeth. It is sad, but it doesn't surprise me.