i herd that girl have 3 holes: 1 to pee, one to shit and one to have a kid....if i was to masturbate(which i havent) which hole would i stick mi finger in?
You're right. There are three holes. The one you pee from is so small you wouldn't be able to stick a finger in; in fact, it would be hard to find unless you watched yourself pee.
The second hole is your vagina - where you have your period through, babies, and have penetrative sex.
The third hole is your anus, where poop comes out.
Masturbation can include penetrating either the vagina or the anus, though 'fingering' commonly refers to the vagina. Even more common than putting a finger in a hole is using the fingers to rub the clitoris.
Many females orgasm most easily from contact with the clitoris, though it all depends on what your body responds best to.