I really love CBT. Having my balls squeezed, stretched, slapped, and (non-alliteratively) twisted. Really get off on rough play with my cock, too, though because it's so skinny, panic and freak out when it's "torqued", afraid when it's bent it'll snap. A few girls have done that. Love restraint, especially when my wife ties me spread-eagled on the bed. It's the sense of helplessness and vulnerability. The Lorena Bobbitt fear! I suppose there's a pain level but haven't reached it yet.
Not much experience with men. One of my roommates in college confided he was into sadism but no girls to work it on. So he practiced on me three or four times. We were both big guys: he was into body-building and I played football. It got pretty rough. However, as a guy, he was instinctively much more aware of limits, how far to go with something, more so than women. It was a different dynamic with a man than a woman -- the male-to-male dominance aspect, especially since he was much better hung, using that psychologically as part of the dominance and control.
