Cock an ball torture (CBT) is a sexual activity involving torture of the male genitals. This may involve directly painful activities, such as wax play, genital spanking, ball busting, genital flogging, genital bondage, urethral play, electrical play, or tickle torture. It may equally consist of the use of cock harnesses, testicle cuffs, parachutes, prolonged stimulation (teasing), metal cages, cock rings, English cages, not necessarily leading to orgasm. Erotic electrostimulation may be used in CBT.