I am/was heavily into CBT. I don't know why but I find the pain enjoyable. So, a few years ago after we decided that I was fine with not getting my wife pregnant anymore, I set something up. I let her tie me up in some rubber stuff so I couldn't move at all, then she tied my testicles so they stuck out and closed this stool thing around them. I gave her the okay, she gagged me, and then she went to town. Kicking, stomping, burning, stabbing with needles, smashing with a meat tenderizer... I don't even remember everything she did but by the time she was done, the next thing I remember was being in the emergency room and being told they couldn't be fixed and had to be removed to save my life or something. I've been on some hormone treatment since then that also means I can still enjoy sex, apparently. God, that was the best night of my life.