I'm into CBT up to a point. Like, I don't want anyone taking a mallet to my balls. But tying, stretching, ball splitters, slaps and light punches, electro and light shocks; that kind of stuff I'm very into, especially if geared up and restrained
Even outside CBT play, a bulge with some sick looking cockrings underneath is always fun... But even better when you can slap and punch it around and watch it bounce.