I think that having some jewellies on your ears is nice. That could make girls more beautiful. But having jewellies on other part of the body? I don't think that very smart. Because having a hole on other part of the body is pretty hurt. And other people won't even see that. For example, you can't open your mouth all day to show other people your pierced tongue. And eating with that will be pretty uncomfortable. So I don't think teenagers should have pierced tongue or pierced nose or other stuff like that.