One hypothesis is that around the Enlightenment, “scientists” realized that women, in fact, didn’t need to orgasm in order to get pregnant. So a woman’s pleasure during sex became less of a priority for society writ large, and this remains the case today. You might want to have a conversation with your partner(s) about your sexual preferences–being careful, of course, not to pressure them into doing anything they just don’t want to do. If they’re not into the things you’re into, it’s ok to move on. Thank u, next. (For more on the one-sex theory, see Thomas Laquer’s Making Sex: Body and Gender from Greeks to Freud, HQ1075 .L37 1992)