[Serious] Why do women have sex?

According to a study which surveyed over 800 college students, only 39% of women reported having an orgasm. Another group of writers asked over 1,000 women from all over the world their reasons for wanting sex and report that pleasure was rarely a reason. They reported that women use sex mostly as a means to an end. They use it to please their partner for some greater purpose and to boost their self esteem. I would assume women barely orgasm in comparison to their male counterpart is because it's harder to arouse a woman (sex drive difference) and it's harder to please a woman (female anatomy is retarded. Clitoris is almost too sensitive to stimulate but must be stimulated for them to receive any physical pleasurable sensation lul). Also, intercourse, which is literally the default act for most mammals to procreate is insufficient for female pleasure.

So if women know this, why do they even have sex? Why engage in intercourse with someone if you aren't getting anything out of it physically? I thought women weren't slimy, manipulative snakes who bear no ulterior motives, or, at least that's what Reddit told me.