Sexuality (and availability) has more to do with it than men and women not being friends. Many gay men have a woman as a best friend, so it is not a universal thing.
I would generally agree that many, if not most, straight men would have sex with a woman friend given the opportunity. “Orbiters”. I have also observed such behaviors, and it does seem a little obvious from the outside of a social group.
Human jealousy is a valid evolutionary trait the developed to protect one’s offspring. There is a reason one would feel uncomfortable having their partner spending a lot of time with available, rival mating partners.
Sexuality (and availability) has more to do with it than men and women not being friends. Many gay men have a woman as a best friend, so it is not a universal thing.
I would generally agree that many, if not most, straight men would have sex with a woman friend given the opportunity. “Orbiters”. I have also observed such behaviors, and it does seem a little obvious from the outside of a social group.
Human jealousy is a valid evolutionary trait the developed to protect one’s offspring. There is a reason one would feel uncomfortable having their partner spending a lot of time with available, rival mating partners.