Two main sexual fantasies from years ago when I was more repressed [the first one is "in anime", if that makes sense]:
1. Two guys kidnap a blond, short-haired, really voluptuous ~20-yr-old and take her back to a filthy abandoned warehouse to rape her repeatedly. Also they have a naked, beat up loli slave who wears a metal and chain collar, in addition to having a largish pipe shoved into her pussy at all times. Varies from this point on.
2. I am restrained in a small dungeon-ish room. I can't really explain the contraption I'm restrained by, but suffice it to say that my legs are spread apart, I have a catheter and an enema tube in my urethra and ass respectively, and they both lead to a bowl directly in front of my face, which I will most likely eat/drink out of at some point due to extreme hunger and thirst. Also, I am fucked, pissed and cum on repeatedly, in large amounts.
notes: (a) Don't copypasta this. (b) I am a girl. Whatevs if you don't believe me. (c) Since I became sexually active (whatever small amounts of ass I *can* get), I haven't had any fantasy remotely like this. My fantasies are really tame now, maybe with some hair-pulling or mild restraint/choking at the most extreme.