It seems like we’ve already established that men care a lot more than women do about how many sexual partners their spouse has had in the past. I figure there’s an evolutionary reason that promiscuity is not as unattractive to straight women; if a man has slept around, it means he’s got the status to do so, whereas pretty much any woman can sleep around. My question is why promiscuity/sluttiness is so specifically unattractive to men, instead of not mattering at all. I’m looking for mostly rational or evolutionary reasons, rather than purely cultural (e.g. Obviously it has to do with slut shaming in society, but I tend to think all global cultural phenomena have a foundation in biological/rational drives, or else they wouldn’t be so universal).