1. Most of us are wired to pair bond, suggesting that a committed "husband"/father mattered throughout our evolutionary history (i.e. there weren't so many resources that children didn't need fathers, and children weren't raised equally by the whole tribe).

  2. Without modern technology (i.e. throughout our evolutionary history) there was no effective birth control, so sex could be assumed to lead to pregnancy, though I suppose people could have killed their newborns as a form of birth control, but...

  3. ...without modern technology pregnancy itself is quite risky for the woman, she could die etc. Wasting a pregnancy (and remember without effective birth control sex leads to pegnancy, so might as well say "wasting sex") on a guy who is not committed or who would make a bad "husband"/father is something women should be wired to avoid.

  4. On top of that, a pregnant woman could be weak, sick, and need someone to take care of her. An uncommitted man would not be there for her, a man who is a bad "husband"/father would not do a good job taking care of her.

  5. Human children take a very long time to grow into adults, they need a lot of care. Women should want men who would be committed at least until the kids become fully grown adults, and perhaps even past that (the man could be committed to his adult children and their children or his grandchildren).

  6. Having another man's kid would make a woman less desirable to a man who would make a good "husband"/father, and who would want to commit.

  7. Also strength-related traits have strong genetic components, perhaps commitment/good "husband"/good father traits do as well. If a woman has kids by a man who doesn't want to commit, or who would make a bad "husband"/father then those kids would inherit those genes and perhaps would not take good care of their own kids. The genes of women who are willing to have casual sex should be at a long term disadvantage to the genes of women who select committed men who are good "husbands" and fathers.

These things lead me to the conclusion that women are wired to avoid commitment-free sex and avoid sex with men who would make bad "husbands"/fathers.

It is natural for women to seek out the best man she can get who is a combination of traits that signal strength/ability to take care of the woman and children, as well as the desire to do so, so things like commitment, loyalty, wanting to provide.

A weak guy couldn't take care of the woman and her children, a guy who is not committed could leave or cheat and divert resources to his mistresses/other children.

If women wanted to have lots of casual sex, they could easily do so, and you might have lots and lots of women with hundreds of sexual partners. This is not what the stats on lifetime partners that I've seen show.

Yet TRP talks a lot about the cock carousel, so maybe some women do "ride the carousel" (though really any woman who really spends her youth riding the carousel should rack up huge numbers of partners).

Assuming some women do truly want to have casual sex, I would argue that they've been brainwashed/peer-pressured by society to go against their natures. Maybe they are actively deceived by men who try to pass themselves off as potential strong and loyal mates, when in reality they just want to "pump and dump".

Then you get stuff like this:

http://totalsororitymove.com/is-it-possible-that-there-is-something-in-between-consensual-sex-and-rape-and-that-it-happens-to-almost-every-girl-out-there/

It wasn’t until he grabbed a condom that I really knew how I felt. I was not okay with this. I did not want to have sex with him.

But I did.

He slid inside me and I didn’t say a word. At the time, I didn’t know why. Maybe I didn’t want to feel like I’d led him on. Maybe I didn’t want to disappoint him. Maybe I just didn’t want to deal with the “let’s do it, but no, we shouldn’t” verbal tug-of-war that so often happens before sleeping with someone. It was easier to just do it. Besides, we were already in bed, and this is what people in bed do. I felt an obligation, a duty to go through with it. I felt guilty for not wanting to. I wasn’t a virgin. I’d done this before. It shouldn’t have been a big deal–it’s just sex–so I didn’t want to make it one.

I stared at the ceiling the whole time, occasionally flashing him the fake smile reserved for people you accidentally make eye contact with in the grocery store. I don’t think I moved the entire time, and I didn’t care if he noticed. I just wanted it to end, and I knew it wouldn’t be long. I just had to suck it up for a few minutes, let him do his thing, and it would be over.

This is a person who didn't want to have sex but did because of... social pressure? Brainwashing?

I wonder how much casual sex/ONS that is had by women is like the above example, or is due to peer pressure and societal brainwashing, or being deceived by the guy into thinking that he's commitment material rather than genuine desire to do so.

If you look at the kind of thing women really want (i.e. the kinds of traits male leads in popular romances geared at women have, what women fantasize about) it is a Mr. Right who has the qualities that signal strength as well as loyalty, it's not a lot of one night stands and casual sex.