How do I know if my girlfriend is having an orgasm? She says she does but sometimes i dont believe her. during sex, fingering, and eating her out she does have something after a while... she grabs hold of something tight or just tenses up. but her vagina never moves. i never see or feel it like pulsing. is she still having an orgasm or whats the deal here? and there have been times where i have been unsuccessful in giving her one.. so is she faking or what.. weve been going out for a year... and she seems to love sex???!! someone help!