Cock and ball torture (CBT), penis torture or dick torture is a sexual activity involving application of pain or constriction to the male genitals. This may involve directly painful activities, such as genital piercing, wax play, genital spanking, squeezing, ball-busting, genital flogging, urethral play, tickle torture, erotic electrostimulation or even kicking.[1] The recipient of such activities may receive direct physical pleasure via masochism, or emotional pleasure through erotic humiliation, or knowledge that the play is pleasing to a sadistic dominant. Many of these practices carry significant health risks.
"Ball-busting" is a form of CBT in which a man has his testicles kicked, kneed, punched or squeezed. In addition to its occasional role in BDSM pornography, Tamakeri (玉蹴り) (lit. ball-kicking) is a separate genre in Japan. Like many of the other activities in this article, it carries significant health risks, including the possibility of permanent damage to the testicles through testicular trauma.