I see a lot of "d'awwww rape fantasy means they secretly want to be raped" business going on in here, and would like to clear up some myths about this.
First of all, yes, rape fantasy exists. From the (to keep things consistent with the rest of the article and thread, but is by no means limited to) woman's point of view, the rape fantasy is not one of being overpowered and harmed, bruised and cut, left teary and with possibly another man's unborn child. Rape fantasy is about being ravaged, swept away by irrepressible passion, passion that smashes the concepts of "yes" and "no", the lavishing of attention upon the "victim" by the "perpetrator". The violence and hostility inherent in the act of rape is seldom considered a part of the fantasy. They don't want to be hurt, they want the boning of a lifetime. This is what rape fantasy is about.
One has to take into consideration the psycho-sexual landscape of (let's go with for the purpose of our discussion) the United States. No means no, yes means yes. Simple enough.
But good girls don't say "yes" because those girls are sluts, and sluts are bad. So "no" can in fact be a stifled "yes" depending on the person who is being talked about, also depending upon the situation. That is what is known as "false modesty". Rape fantasy rises above convention, to see that no can be yes, in these situations, and to have the man instantly read the mind of the woman, and pounce, lavishing her with attention. These traits of passion and sensitivity to another's needs are considered highly prized among (many) females in (American) society, so it is a small wonder that, from an outsider's perspective, or to someone who wasn't entirely aware of all of the implications of rape, that such a fantasy could occur.
Of course, there are cases where it is a matter of power role-playing, much like BDSM is. Again, the crux of the pleasure attained in these situations is due to the force, the passion, less than the act itself.
This is a common fetish, and not a deviant behavior to act upon it within the consensual boundaries of an established relationship.
Let me hammer this home: just because you have a rape fetish does not mean that you actually want to be raped or to rape someone, as rape is harmful. It is seldom, very seldom the case that somebody should want to be hurt or hurt another in the context of the fantasy. And it's not weird.
I am a Sociology major minoring in Gender Studies. If you take issue with this explanation of the psychology of rape fantasy and fetishism, please feel free to IM me. In the mean time, I hope that this has cleared up some frankly disgusting ideas about the desire to be raped or to rape.