CBT stands for cock and ball torture and refers to the infliction of pain and/or constriction to those body parts. CBT can incorporate a wide range of activities including cock & ball bondage, piercing play, flogging/cropping of the genitals, electro stimulation, sounding, stretching, compression, punching, slapping, kicking, trampling, hot wax, and more. CBT can range from relatively mild to extremely painful.