Beta Bob spends a lot of time with Average Ann. Bob thinks they're close enough and asks her out. Ann says he's only a friend to her. Bob is sad, complains on the internet and is lambasted.

Alpha Alan meets Average Ann and approaches her agressi- -ahem- confidently. A few days later, they sleep with each other. Afterwards, Alan does not respond to texts anymore. Ann is sad, complains on the internet and is consoled.

If women aren't "machines where you put in niceness and get sex in return" why is it okay to assume that men are "machines where you put in sex and get commitment"?