I agree that orgasm through vaginal stimulation only is entirely possible. Yes it feels different from clitoral stimulation. I do believe however that it is linked to your feelings for the male you are with. The closer you are this form of orgasm is easier to achieve. Contrary to all jokes most men do know where the clitoris is, some indeed insist you need to orgasm that way, that you can't have had an orgasm only with penile thrusting. I do feel so sorry for men now, they are so intimidated by sex. They are picked on for the size of their penis, both width and length. Their ability to thrust for hours without coming. Come on ladies let's at least respect the man's feelings we are in bed with. There are times when a "quickie" is enough, and times when you have time to linger and savour. I certainly don't want a stud performance every time. Some times, I am tired and allow sex to keep my man happy. Listen to each other.