First, I would like to point out that we are talking about erotic fiction or stories here not about actual "scenes" or part of a real relationship.
Originally Posted by Bald_J_and_F
I may have been misunderstood here, what I wanted to say was that stories featuring blackmail almost inevitably include humiliation. I guess it's a natural phenomenon because in the "public" environment of a blackmail story (where the victim is still active in normal society and not confined to some dungeon) humiliation is very easily introduced.
Satan_Klaus