I have never had an orgasm with another person. Have never had a G spot orgasm even by myself.

I can't explain it but something about intercourse with another person makes me feel violated and while I can become aroused (like you) I don't orgasm. I think perhaps by allowing another person to bring me to that place I feel like I am giving them too much power. I hate not being in control.

Are you worried about not being in control perhaps? Would it help if he were to lay down and not touch you, allowing you to make all the moves?

There are also sexual positions that would allow you to remain if not entirely on your stomach at least close to.