The biggest erotic stimulation I feel generally comes though humiliation with an erotic twist. Fetishes and fantasies are pretty much all psychological for me, and humiliation administered by a dominant or authoritative female is incredibly exciting.
It's all in the way the woman firmly shows she's in charge and has control, while the man is in some silly predicament for her amusement or his punishment. To me, humiliation must be administered by FORCE against his will, otherwise, it just doesn't produce the desired effect.
Her "amusement" is the key to humiliation. It makes an enormous difference on the erotic impact when the man can feel, see, and know that the woman is enjoying the situation with maximum delight. If she's laughing, if she's happy, if she sweetly amused, then it's extraordinary and delightful.