It's because what I say is the truth, when I humiliate you, I simply say things that are true. It arouses you so much because the truth is sexy. It's liberating to admit your deepest, darkest fantasies to another person.
That's what makes you so pathetic and worthless. It's a miracle that people on the street don't see it. That they don't notice how deprived you really are.
I want you to say after me,
I am pathetic and worthless. Say it! I am pathetic and worthless. Say it again I am pathetic and worthless.