Maybe try reading bara? I have a list of bara manga that I liked:
http://www.mangago.me/home/mangalist/207932/
only a couple have rape like darkness hound, priapus, and kyokan hunter
If you like rape you should get some therapy cause that is fucked up. I hope you never rape someone in real life.

Any yaoi or hentai where a muscular man rape someone? (=・ω・=)