I had an issue with the forced and pain. I didn't know to what levels they were talking about. Discomfort is fine but if it will leave a long term mark that is not.
I think my masochism score is a bit high because I do like my wife to fight back, to sometimes even get a swing in, but only because I think it's cute and then have an opportunity to punish her. If she actually managed to hurt me I have no idea what I would do but it wouldn't be pretty.