Why do some women enjoy an*l sex?

Okay,For So Long I've been trying to find out why a woman would want to have an*l sex.
I dont understand it.
Has anyone actually done it?
Does it hurt? Does it feel good?
Can you org*sm from it?

Details,girls
;]

well I've never tried it with my girlfriend but a friend of mine told me about it yesterday he said it felt realy good well for him any ways because its all tight you know..and supposedly the girl felt good too..but I dont think I would ever try it with my girl..kinda disgusting I mean what would happen to your butt lol..o and no you cant org**m from it