Do some research on "thought reform." This is what the Communists did in the Korean war, and a number of cults do--especially Sun Myung Moon's "Unification 'church.'" I used to be a bit more knowedgable about this, but I remember that the dynamic is rather similar among a number of groups and ideologies.

The first thing is "break down," whereby the subject's (victim's) sense of self, self-esteem, and identification with family and background is challenged, disparaged, and, well, broken down. Psychological harassment, sleep deprivation, alien foods (irregularly allowed), are common techniques. Also found are forcing the subject to do menial work, especially if the person was of some stature or class status.

In the case of Patricia Hearst, it involved rape. Sure you can work that!! The point is to get the subject/victim emotionally vulnerable.

Then the fun begins, but this is where my recollection gets fuzzy. A new sense of self and identity is developed, along with a sense of identification with and loyalty to the oppressor. This is where you get your real slave mentality. The person believes she deserved it, that her new control person/group/belief system is right, and that she (or he) is privileged to serve!

Do some research and you can come up with a narrative structure that will allow opportunity for all sorts of psychological and physical torment. One thing I do remember is very interesting, and it's a little complicated. Don't think that every "bad behavior" requiring "correction" is to be punished! That is not as effective in reinforcing a new behavior as irregular and inconsistent conditioning!! I don't know why, but that's the way it's supposed to work. Suppose the girl is supposed to lick her master's shoes every time he enters a room, and she forgets or disobeys. Sometimes you punish her, other times you magnaminously forgive her, then you punish her, then another time you simply overlook the failure/refusal. This never-know-when-you'll-be-hurt is the most powerful way to get a behavior instilled, for some reason.

All this would involve some serious structural organization to a story, instead of just writing it out, fantasy after fantasy. But it would make for a heck of a plot

Should we start a support group, "Perfectionistic Porno Procrastinators Anonymous?"