So I read the requests. All of them. No, seriously I do.
One of the common things I see (and get offered) are Master/slave scenarios, often non-con, in which the Dominant creates a sub, or something like that. This also fits with the scenarios in which one character "pimps" another, or makes a pet out of the unwilling. Usually there's no bridge for this gap, it's a case of "I kidnap you and make you my obedient slave, you're nude, sex now."
To me the interesting and erotic (in a scary way!) part of that sort of "pairing" is the process. The kidnapped girl or exploited daughter doesn't just roll out of bed and decide she wants to completely submit, especially if it's painful or degrading. There's a series of events that either convince her that submission is the only option or break down her defense mechanisms to the point she just obeys.
So that's what this bunny is all about, how does that work? How does the sadist go about stripping humanity and breaking the mind and emotions of an unwilling participant until she's a jaded, shameless slut and whore, or a complete masochist? A partner recently dived into this a little with me, and we started towards the middle of it- how does it look from the beginning.
Clearly I'm wanting to talk to the cruel here. Male and female alike work for these themes.
Discord and PM is fun for discussion, but I think if I really wrote this it would be on the forum.