I don't see why so many of you are associating --even equating--blackmail and humiliation. Certainly, they can be combined in many plots and scenaria, but they are not equivalent, and one does not necessarily involve the other.

Blackmail is a form of power. If you have compromising knowledge of somebody you can blackmail her. She obeys or faces painful consequences, which could be the payment of money, performance of a service (divulging her company's secret catsup recipe), something humiliating, or just a plain old fuck. If you put a gun to her head of kidnaped her mother, you would have power to make her do the same things!

Humiliation is the experience of doing something (or being seen as) shameful, immodest, or degrading. You can certainly blackmail a character into, oh, riding down Main Street naked on a white horse. Or make her do it because you have her kid hanging by his thumbs from a dungeon rafter, or there's a sniper's bullet aimed at her head....you get the idea.

For whatever reason, and by whatever form of power, force, or coercion, humiliation occurs when a character experiences something that is shameful or degrading.

The two are not equivalent, nor does one have to include, or lead to, the other.

I kind of dig characters who are forced to do something that violates their moral code, and is degrading by violating their sense of modesty. That's part of my thing for the abuse and rape of younger girls and virtuous young women in formal gowns: all that delicate material, so woefully inadequate to keep their prissy little privates covered. One scenario I'm kind of partial to is that of a teenage girl in a bouffant party dress forced to lift it up in front of her family and guests. Her panties are ripped off and she is made to walk around her birthday party and have everybody look at her, maybe kiss her cunt, or something. Then the assailant crudely gropes her, while everybody is (at gunpoint, perhaps?) powerless to protect her. Then she's given the choice to be forcibly raped in front of everybody, or to have the privilege of "privacy" in her bedroom if she'll submit willingly.

Humiliation, abuse, coercion, violation...but no blackmail.