Men's greatest desire is to feel desired sexually by women. In general all straight men want to feel desired by women, they want to feel like an object of lust and pleasure. This is why harems are such a common fantasy, men want to feel desired by many women. The greatest expression of desire from a woman is having sex with said man, and that's when issues arise.

The alpha fux beta bux dichotomy comes from a simple fact: some men get easy sex while other men have to work for it. Another way to put it is that some men are "hookup material" and others are "boyfriend material" but most wen would rather be the former than the latter. Due to our innate desire to be desired we want that because for a woman to have sex with a man she just met she must REALLY desire him.

On the other hand, "boyfriend material" men often have to work for what other men have gotten easily. Having to put in extra work to have sex means you're not as desired as the ones who got it easily. Men who are made to wait by wonen who put out easily for others don't feel desired, they feel like a backup plan at best.

This is also why so many men are repelled by high count women and have a sort of virgin fetish: if a woman puts out easily for anyone she doesn't desire him, she's just easy and if she makes him wait while putting out easily to others it means she doesn't desire him as much as the others. With a virgin, on the other hand, the guy is the ONLY guy so he not only feels extremely desured but he also feels special and unique due to the exclusivity.

Wonen often have a hard time understanding how men feel about all that because they are inherently desired simply by existing so they don't have to put any work in to feel desired.