I've never participated in sub/dom play but am curious about the mechanics of it. So my first question is this: how much fear and or pain is too much? When, if ever, as a Dom do you say to yourself "He/she looks really scared, maybe I'm going to far"? Have you subs had any experiences where you were honestly scared? How did it make you feel afterwards? Have you doms out there ever felt bad about really frightening your partner?