I have nothing against people who have a lot of piercings. It's their way of expressing themselves and if they're happy with it then let them be.

But piercing the tongue or mouth can be unsanitary and you could get an infection. It is also a breeding ground for bacteria.

Your teeth could get deformed too.

As for myself, my ears are the only part of my body that are pierced. I don't plan on getting a piercing on the other parts of my body. It's painful. T_T