Though not "experienced" with sex (as I am only 19), I have been sexually "active" for about four years now. Through three different partners (two men and a woman), numerous positions, toys, and attempts at masturbation, I have never been able to have an orgasm. I enjoy the experience quite a bit, often becoming what my current boyfriend refers to as "insatiable", but I can't seem to hit the plateau. He's very good, and tries so hard to please me, and even through my own attempts, nothing seems to work... Is there any way I can fix this?