Nothing dirty here people.
Semi-recently, I watched a part of a video wherein Maggie Gyllenhaal was talking about the female orgasm. I didn't get to the end, but the reason why there is a female orgasm seems fairly obvious to me...
She said that females don't need orgasms to procreate, but men do (when they ejaculate, they orgasm). However, don't males follow the female template? After all, the head of the penis and the clitoris share a common origin. Evolution is a tinkerer, and it would be far too much effort to insure that one gender had orgasms while another didn't. It's so much easier to leave it behind.
Also, it can be called an exaptation... It's been adapted to make sex more fun. If people have more sex, there should be more babies! This was true until the advent of modern,effective contraception.
I hope that's what they found at least.
It just freaks me out how oppressed women must have been if doctors couldn't understand what an orgasm looked like in the opposite gender.