I write what I enjoy. You should make it your mission, to write the story that you want others to know, that is inside your head.
Rape by its nature is a crime, about someone overpowering another for their own pleasure, regardless of the damage. But rape, like any crime, isn't something that happens, there's a build up. Whether the rapist planned in advance, or is a mere opportunist, the person made a conscious choice to commit an act on someone, based one, A) they could do it, B) they can achieve its end, and C), which is the important part, they think they can get away with it. Even as they prey on their victim, a predator is always wary of being caught.
In the Soviet Union, under Joseph Stalin, there was a sadistic man called Beria, who was in charge of the NKVD (Communist version of the Gestapo, except ten times more effective), and because of his power to destroy people, and his usefulness to Stalin, Beria was able to use his position to have random women picked up, brought to his place, raped, and thrown back into the street they were found. Why? Because no would, or could stop him.