agreed 100% it has historically been used as a legitimate insult to women, it’s just really recently started being turned around to be used on men, and even then like you call a man a slut and people laugh and go “yeah! manwhore!” but if you call a woman that its often considered to be a much worse thing publicly. This comes from the long history of men not being shamed for being promiscuous, but women being shamed by both genders for it.
while I agree with you, in society people focus WAY more negative energy on women for having high body counts. Literally I had to stick up for this one girl on my campus (wasn’t even super close to her), because men were hardcore slut shaming her. When i pointed out men do the same, they got all defensive and pretended like they were just “stating facts”.