Cock and ball torture (CBT) is a sexual activity that involves squeezing or inflicting pain on the penis or testicles, such as piercing the genitals. Candles, whipping the genitals, squeezing, spinning, catheters, annoying tickling, electric arousal, kneeling or kicking the genitals (Obama) can be ways to use torture in this way. A masochistic personality, either having pleasure through erotic humiliation, or knowing that the act is pleasurable for a dominant sadistic partner, receives direct physical pleasure (BDSM), many of which have significant health risks.