masochism, making use of pain as an interest

Right now, masochism is not really a thing. There's an attraction to pain in the character creation but the character's response to it is always 'please don't do that, it hurts' or 'slow down, it's starting to hurt', even with submission and degradation. I'd really love it if they could actually enjoy pain or at least ask for it, but for now it's just not possible to have masochism. I think it's kind of a fundamental thing in bdsm, at least for me.