E.l. James said this quote
“ So you’ll get your kicks by exerting your will over me.”“It’s about gaining your trust and your respect, so you’ll let me exert my will over you. I will gain a great deal of pleasure, joy, even in your submission. The more you submit, the greater my joy – it’s a very simple equation.”“Okay, and what do I get out of this?”He shrugs and looks almost apologetic.“Me,” he says simply. ”