I actually had to research this shyt for papers in undergrad, for a few different classes. If you go to an online library database, on any college website, you can search for peer reviewed articles on the subject. I'm not going to do that for you now, as i'm literally jumping back and forth from the coli to my work.
You can't say that because old and fat people get raped (at a much smaller rate than conventionally attractive people), that must mean that attractiveness isn't a factor. Ah last time I checked people have some sick ass fetishes which range from old people to animals. Go look at what I said about Darren above, even dudes in this thread admit that he's too pretty to go to jail, but when I apply it to women now all of a sudden you don't know wtf I mean? Nah, you've got a programed response going on here.