Being alpha means having the best genes. Men and women have different strategies for casual sex. When men aim for casual sex, its far more of a whatever I can get type deal, when women aim for casual sex, it's the hottest guy they can find. The evolutionary reason is simple, if she is going to get pregnant with an uncommitted man, might as well get the best DNA. Men that have casual sex, aren't investing any resources in raising their children so picking a quality woman doesn't matter. Anything goes... This is the definition of Sexual Strategy remember where you guys heard that word?
This reply explains it perfectly
I've only ever hooked up with guys that I would consider to be a 10. Like the ones that look like movie stars, and my friends drool over, and i would never in a million years be good enough for
Now here's what ends up happening these women that now sleep with these 10s, will view their husbands/boyfriends as never good enough. If she was a 7, she will likely marry a guy that is a 6-7, but in her 20s slept with all 10s. This isn't just a woman type thing, imagine if you spent your entire 20s banging women that looked like porn stars, and when you get married you get married to a Plain Jane. Or you spent your life having google fiber, then had to switch to dial up.
Would you hold much respect for your wife? Would you view her as disposable? Would you hold a resentment towards her? Would you be more likely to cheat? This is why TRP tells you to avoid sluts, women that have casual sex, bang guys way above their league. And when they settle down, they settle down with a guy much uglier than the guys she used to bang. And this kills her respect and attraction to him.
Also this goes to show that "casual sex" / "hook up culture" doesn't do shit for the average guy in fact it hurts his chances of getting sex. The girls that would be looking for boyfriends are part of one alpha's harem.
Women that don't sleep around or have sex in the context of relationships generally sleep with men of their relative attractiveness. And are far more receptive and caring for their partners. This is why TRP prefers girls like these for LTRs.
Hope you new users learned something. This isn't some crazy lizard brain theory crafting it's straight from women's mouths :).