When somebody says, “I don’t think women should be raped for wearing short skirts, but what do they expect when they do go out like that?” what you are actually saying is that if a woman in a short skirt is raped, you will be less likely to hold her rapist culpable. Which makes a woman in a short skirt really appealing to a rapist. That’s something that you did. That’s not something the woman in the short skirt did, or something the rapist did. You made that woman a more comfortable target by making it clear that if she got raped, you would be less upset about it, less willing to see the rapist go to jail, less willing to support the woman. A woman is not increasing her risk of being raped by wearing a short skirt. You are increasing her risk of being raped by saying that women who get raped in short skirts should have expected that. Rapists hear you say that. By only raping the women that bystanders agree should be raped, a rapist reduces his chance of being caught and, if caught, punished. And that is why he will pick those women, over and over again, not because there is something more appealingly rapeable about them — they have what any woman has, as far as rape goes — but because he will be less likely to be held culpable for his actions.