My boyfriend wants me to hit him during sex. Punching, slapping, kicking, stuff that would leave bruises. I can't do it because i'm not a sadist, but he absolutely loves this type of abuse when we're fucking. I don't know how to completely satisfy him. I'm worried he'll end up going to the hospital because i choked him out, or punched him too hard, too many times. It isn't wrong that i don't want to do that, right?