what's the best way for my gf to have a penetration orgasm?
Apparently a friend of my gf told her that "Omg I finally had an orgasm through penetration with my bf last night". This got my gf a bit worried about herself since she has never experienced that apparently... with anyone ever. She's 26.
I get the feeling she hasn't experimented much with sex in her life (although she's had a fair amount of it). During sex she always stimulates her clitoris at the same time to lead to orgasm. She wants to know if she can have an orgasm without needing to do that.
I'm not exactly sure what I can do to make her have an orgasm this way... a previous gf of mine did... but I don't recall doing anything special to have that happen.
So what I'm asking is what is the best way to lead her to orgasm in this way... what can she do?... what can I do? (positions, movements, etc...)