I like to inflict CBT on myself. I'm not into pain as much as I am just the feeling of restraining my balls and cock. Okay, there's some pain involved but not like ball-busting pain or sticking needles in my balls or cock. I've tried a lot of different things, like a homemade humbler and a cock board that I can stick my cock and balls through a tie down. Those plastic hair clamps work well too. I'll share pics with you if you contact me. I would love to chat with someone who shares this fetish.