As a survivor of rape I can tell you, after many years of secrecy, that it is common for many victims of rape to have guilt. Guilt because a for many there was a point of enjoyment and turn on by this act even though it wasn't consensual. I still get turned on by the stories of being taken in this way. This is part of the reason I have a deep seeded fascination with BDSM. I have in many ways taken control of my life in finding a safe way to face these demons. I like it rough, and sometimes the idea of an unknown assailant. There are some people who feel this way. I am by no means speaking for every one who has been through this sort of thing. But after being molested as a child, I had to find some way to express and investigate the feelings I had. Yes, I got wet! Yes, I got excited! No, I didn't understand it! I was afraid for my life and turned on at the same time! It's an odd feeling.... many confusing emotions at once. But while I still hate the person who forced these things on me I found it very erotic.
Sorry to rant, but it's a different perspective.