My girlfriend has never had an orgasm. It isnt a problem of pleasure. She loves it and says she's very satisfied. While we have sex, use vibrators on her, or give her oral, she "build up" she gets louder and louder and eventually it gets to a point where she (is kind of crying almost in pleasure with like tears), then all of a sudden, she makes me stop. She doesnt let me move a muscle or she freaks out. Even if i caress her thigh its too much stimulation for her. I dont know if I'll ever be able to make her orgasm, but no matter how much we talk about it, when she gets to that point she's irrational. I sometimes think that she IS having an orgasm and just doesnt know how to recognize it, but in reality i just dont know. Any ideaS?