Suddenly sliding away from that peak is disappointing, to say the least. That's doubly true for women, many of whom find it much harder to achieve orgasm during penetrative sex. In fact, according to a recent survey, only 65 percent of heterosexual women consistently reach the pinnacle of pleasure during sex. So what can you do to help her reach that peak? Help her relax, says sex therapist Ian Kerner, Ph. Translation: if you make a woman feel so good that she completely forgets about everything else, then you're highly likely to give her an orgasm.