men inherently biologically care about a womans past because paternity tests were never a thing until recently; and the absolute worst thing for a man to do is spend money and years caring for a kid who isn't his. So if a woman sleeps with other guys that drastically increases the chance that a kid she has isn't her husbands. So men have an inherent disgust response to high body counts, women don't have this so they don't understand this dynamic inherently and must be told about it through culture. They know it matters to guys, but not why. Also women pair bond with a guy during climax during sex. The more sex with more different guys they have drastically decreases how loyal they will be to one guy in particular. The stats show that if a girl has been with more than 5 guys, there is an 80% chance she will have filed for divorce within 10 years of a marriage vs if she gets married as a virgin there is an 80% chance she will still be married in 10 years because she won't be thinking that the grass might be greener on the other side, or know that there was some other guy she keeps dreaming of who was better in bed or "the one that got away" so yes body count matters for real biological reasons, not just feminism or cultural reasons.