I'll keep this short, but I was with a chick last night who is into rough sex... biting, pinching, hair pulling, a little pain. I admit I don't have a lot of experience with a chick like this so it was quite an experience. Never really met a chick who was into that so I was a little unsure about what to do. I'm all for playing rough a bit, but I don't want to leave bruises or actually hurt her. Any tips?