Why do women get so upset when men say that we don't want to be with a woman who sleeps around?

So often on here women ask "do guys like promiscuous women?", and inevitably the response is a resounding "no", at which point a bunch of women will get upset about it. I understand that it's not nice to have guys think you're unattractive but whether or not you are promiscuous is completely under your control...

Although they are a minority, there are some men who don't care - just go for those guys. There are countless things that women are attracted to - height, social status, money, etc. - aren't men allowed to have preferences too?
Why do women get so upset when men say that we don't want to be with a woman who sleeps around?
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