I've been afraid afew tiems myself. Can't say that I fantasize about beating women or even into hurting them while havign sex, but I enjoy being dominant sexually. With my partners submission comes a feeling of power and some times I get too "in the zone" with some of the shit I do. It's in these cases that I worry of going too far when choking, like I won't be able to tell or care when I'm squeezing too hard and I won't be able to tell if they're enjoying thmeselves or screaming in pain, gasping for air or simply wriggling to get away from me.