I’d add to Gracie’s post (see below) and say the hormones for men and women are on opposing sides. For men sex is pretty simple, you’re in and then your’re done. For women sex isn’t simple. Getting pregnant is just one thing.
Although I think it is changing for younger people, those just coming out of high school, women have been taught/ brain washed to dislike our bodies and think we should not have sex. That’s a combination that doesn’t work out so well for men who want simple, easy sex.
A typical woman does not go a day without seeing standards of female beauty, vitality and sexuality plastered all over her world. This does not make the typical woman feel desirable. No wonder she doesn’t feel like having sex any and every time he asks. How many men could go through a day of being shown how inadequate they are and then perform upon request?
Also, being asked for sex in a “pass the salt” way is not romantic. Not that every sexual encounter should or must be romantic, but… It shouldn’t be as commonplace as going to the bathroom either.
Could men put some effort into getting sex? Beyond just asking and expecting sex, could men make it seem like they care versus just taking care of a bodily function? If men need more sex then do what women have done since the dawn of time: masturbate. The orgasms are much better, fantasies are great, and there’s less mess to clean up. What do men think all those rejected women do when they get home, alone?
Dudes, your hormones (primarily, anyway) cycle every 24 hours; that, and not your love for us, is why you get a woody every morning. On the other hand, our cycle of hormones is a bit more complicated and lengthy than that; the result is that we are on far less of a “daily horny schedule” than men. And that’s before we get into realities like the processes of pregnancy and menopause. We don’t just age and change to disrupt your fantasies and desires; we ride the wild wave of our biology because that’s fucking life. Literally.
In a civilized culture, where humanity & good citizenry is defined largely by our ability to override our animal nature, hormones still have their way with us. Even amidst our culture wars and culture lag, they play their role. But, romance aside, if culture is to override such base things as biology, then something desperately needs to be done in terms of equality and the messages being sent to and about women.