I have already posted in another thread regarding this very subject. It was with my exgf and she had a secret fetishism about very rough sex and how it feel to be raped by a group of men. I will say, it is NOT my cup of tea and my exwife also was into rough sex and that was one of the reasons we broke up. My exgf was a tiny Filipina and ended up getting herself in some very dangerous situations in trying to live out the fantasy so I arranged something for her. After it played out, it worked, she never fantasised about being raped again, but she still wanted the rough sex.
This is my exgf