>>2666790different reasons for different people, but here's a sampler
>it's easier to fap if your conscience isn't getting in the way>the idea that a girl might actually want to have sex with you is itself sexy (also good for your emotions)>it's hot when the girl enjoys it too>it's not socially acceptable to fap to rape>people are totally into rape, so long as the girl secretly wanted it the entire time and is only resisting because she's nervous or unprepared or some shit 