all of it =]
depends what she likes
whole. but if he does it with part, that's OK, he might just be shy! Also it really just depends on you and how willing and wet you are.
The opposite of the dorsal part of the finger is the palmar part. The dorsal part is the back of the finger, while the palmar part is the front or underside of the finger.
Only when she wants you to.
if she agrees to it yes
Not a good idea ...
No.
she may have an infection...
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.
Depends how big your fingers are.
Prostate.
No you cannot and I'm not 14. I'm 18.