(Worth noting: this narrative also doesn’t account for homosexuality.
Sexual exclusivity and the obsession with genetic lineage didn’t come about until the development of agriculture – and with it, the idea of private ownership.
More often than not, it gets mixed in with evolutionary psychology – the idea that men and women act a specific way because of evolution.
According to the standard script, women are attracted to “alphas” because they are looking for prime genetic material who can also protect and provide for them, thus ensuring the continuation of their genetic line.
Amongst primates that live in social groups (baboons, chimpanzees, gorillas), the largest, strongest of the male apes is the alpha male; the others are betas.
The alpha rules the pack by dint of his strength and furious violence; he gets the greatest amount of food and unlimited sexual access to the females.