Women want sex, and in particular, they want sex with people who really want them. But socially, many straight men still find it a turnoff when women are sexual aggressors. Which means that, for women, aggressively pursuing the thing they want actually leads to them not getting it. I suspect this is the source of much sexual dissatisfaction of the modern single lady, who's so horny she's running across the street to Walgreens to buy more batteries twice a week, but is unable to pick up men despite social conventions that men are "easy" to bed and women have to be coaxed into casual sex. The thing women are told they can access any time is, maddeningly, often just out of reach.