The male orgasm plays a vital role in human reproduction, given that it typically coincides with ejaculation. Indeed, a man who cannot reach orgasm would likely have a very difficult time ever reproducing. By contrast, the same cannot be said for women--as long as a woman is near the fertile phase of her cycle, she has the potential to become pregnant regardless of whether she orgasms during sex.
This observation has generated a lot of research and debate about why the female orgasm exists. For example, does it have an adaptive purpose we aren't aware of? In other words, do women's orgasms facilitate reproductive success in a non-obvious way? Or is the female orgasm just an evolutionary byproduct that has no impact when it comes to reproduction? Scientists don't agree on the answer, but they've proposed a number of theories. Here's a review of the three most popular ones:Read More