The vagina.
There's also the anus, but not every woman likes that.
Those are your two only options. Unless you count her nose, which would be incredibly weird.
Not a good idea ...
all of it =] depends what she likes
Only when she wants you to.
if she agrees to it yes
she may have an infection...
No.
Right hand ring finger, which id the one next to your little finger.
Ask your boyfriend/girlfriend to wiggle their finger in your belly button. They might do it.
No you cannot and I'm not 14. I'm 18.
This is something you should ask her. She might not be into it.
Depends how big your fingers are.
Prostate.