I often have vanilla people ask me what the draw is for CBT. The male cock and balls are generally considered a sacred place that you don't hurt unless you are "fighting dirty". I think it is the taboo, along with the general sensitivity of that region that makes CBT so fun and fulfilling for its participants. There is nothing more vulnerable than having your balls in your Mistress' hands, feeling the anticipation of the pain she could cause with just a squeeze or a slap. Or having them bound up tightly with rope so that every second you are reminded of your submission to your Mistress. Sounds, weights, crushers, humblers, chastity devices - these are all tools that help Mistress to produce the beautiful and painful sensations that most submissives grow to love. Feel free to comment with your thoughts on CBT.