I could say "yeah, rape is morally wrong", in those words, in that order, but that won't stop rape. Rape is just a part of nature, and whether or not you think it's "morally wrong" doesn't matter. Because rape is just a fact, something which happens. If I were to say that I don't want it to happen, it's just as much my own emotional decision to say that as the rapist thinks it's his own emotional decision to do it; because there's no authority but yourself. Because there's no objective morality, which is just an objective statement which you can arrive at yourself if you realize morality is a social construct - then you can realize that deciding to rape someone was never a logical decision, just as much as saying you don't want to be raped is a logical decision; it's an emotional decision. It may be a fact that emotional decisions happen, but you can only say that people do or do not want to be raped; you can't derive an is from that aught, as the philosopher Hume might say.
