You are such a naughty boy. You are so addicted to it, you think about it often. You know what I am talking about - CBT! You love your cock and balls, it gives you such a pleasure. You think about it even at work. And that's why I am here - to give you quick cbt instructions you can do even at work. Of course, you must be careful that no one sees you;) You will need: a ruler, a hard cover book and a pen. That's all. So easy. Just follow my instructions and make those balls and cock hurt for me!