Ugh. Dudes who go on about women having secret rape fantasies skeeve me out more than pretty much any other MRA/PUA/misogynist category. I am so very, very glad that I've never had to interact with anyone creepy enough to pull that shit in person.
I remember reading or hearing about a study that was supposed to be about happiness and self-deception, where the people running the study had supposedly come up with a bunch of questions that they assumed everyone should be able to answer 'yes' to, and if anyone answered 'no' they were supposedly lying or deceiving themselves. One of their questions was literally "Have you ever wanted to rape or be raped by someone?"
As in, they actually conducted a scientific study that assumed from the outset that every single person on the planet wants to rape or be raped, and used it as the basis to demonstrate something else*. I haven't seen a crap study that icky before or since.
(*Incidentally, if you don't make that assumption, what they actually managed to demonstrate was that people who don't want to rape or be raped are happier than those who do. Fancy that.)