I think tongue piercing is not only stupid, but it's hideous. Many girls do it because they say it brings more pleasure for men during Monica Acts. I can't fathom the low self esteem it must take to mutilate your body for someone else's desires.
If parents only knew why their little precious darlings were doing this, they would be more horrified than they already are.
I hope you read the rest of my post- where I said I preferred tongue piercing over my original plan to stamp a big 'S' on the forehead of the stupid people, because they will do the piercing thing willingly :)