Do you agree with this theory?
First off, orgasm isn't vital for males either. It's possible for males to ejaculate without orgasm/pleasure; it's called "ejaculatory anhedonia" & there's also occasionally sperm in precum. Male orgasm exists solely to encourage males to mate.
Female orgasm also exists to encourage females to mate. But in the case of female orgasm, orgasm also acts a litmus test so that the females ONLY mate with the mates who are most suitable. Females need this litmus test because mating with the wrong person can be deadly.
Proof that female orgasm serves as a litmus test for mate quality?
Women orgasm more often if a man is rich, attractive, and funny.
Women are more likely than men to consider "bad sex" to be a dealbreaker.
The differences in ease of orgasm motivate the different genders to follow the most successful sexual strategy for their gender (it motivates women to seek the highest-quality mates, and motivates men to seek the highest quantity of mates [because they can orgasm with pretty much any sexual partner]).
The fact that women orgasm more easily in sexual acts (such as cunnilingus) that don't include penetration (& therefore, risk of pregnancy) proves that female orgasm exists so a woman can confirm whether a mate is suitable, before she risks having sex with him.
Thus, female orgasm isn't a vestigial byproduct of male orgasm, but a functional method for women to weed out unsuitable mates (the ones who don't give orgasms) and discover the highest-quality mates, so that they don't risk their life carrying the child of an unsuitable mate.
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