Women never cease to emphasize that they are not as primitive and superficial as men, especially when it comes to sexuality. They want to be seen as the more civilized, virtuous gender that doesn't see sex as an urge but as some kind of spirtual, cherished experience bestowed upon a special man of virtue.

Men take this image pretty seriously. Breaking with it, by being a slut namely, naturally incites irritation in men. And other women also engage in shaming, because they see their facade of virtue crumble.