Speaking in terms of evolution it's easy to see why women have a lower sex drive then men. They have more to lose when engaging in sex so the genes for women that had a lower sex drive were passed on. Same for men. Relative speaking men have not much to lose when engaging in sex. So men with a higher sex drive passed on their genes because they had the most sex.

In today's society men are the ones that are expected to initiate because they are the most desperate for sex. That's why they are often seen as the gatekeepers of sex. A lot of men obviously hate this because it seems unfair. Women have nothing to lose from not initiating first because odds are some guy is going to do end up doing it anyway. For instance if your average guy never made the move with a woman the would most likely never be with someone. This is the opposite for women where someone would most likely initiate a relationship first.

Women also often complain about constant dick pics and unsolicited flirtation. However let me ask when has a man ever complained about getting a titty pic or a vag pic. I guarantee you most men wouldn't mind. Hell, most men would pay for it. Both problems previously mentioned would be solved if there was an even amount of sexual desire between men and women. And I think it's safe to say that most other problems would be solved as well.

This is of course is just a thought experiment. I'm curious to hear other people's thoughts on this.