Yes but if you're older than 16 than no.
A belly piercing is a piercing on the belly button. Where your belly button might go in or out, it is the slight arch you get just above it. it is a piercing through that area. depending on how your belly button is formed. Search google for images.
The pain of the belly button piercing should subside after a week.
Its the jewelry that goes into a belly button piercing.
Yes you still can.
A belly button ring is a body piercing placed in a cauterized area of the belly button.
16 if your parents sign with you. If they don't or wont, you have to be 18.
Your belly button piercing hurts more then a normal ear piercing your belly button piercing is more sensitive then a ear. :]
A lip piercing hurts more than a belly button piercing, but neither hurt much at all. Getting your lip feels like you accidentally bit it haha and you can barely feel a belly button piercing.
Bill has a setum piercing but there are rumors about a belly button one.
It usually depends but one parent is the minimum needed to get a piercing.