Having sex for money can change the dimensions of the kinds of acts you're willing to explore. That's a fact in a porno landscape that rewards greater physical punishment with greater paychecks (as it should.) But if BDSM porn performers aren't doing it all purely for their own sexual gratification, how do we define consent? Where does pushing boundaries become abuse? The question seems really important, especially for those who would defend the existence of BDSM porn to dissenters of all stripes.