Cock and ball torture (CBT) is a sexual activity involving the torture of the male genitals. This may involve directly painful activities such as waxplay, genital spanking, squeezing, ball busting, genital clogging, urethra play, tickle torture, erotic electro stimulation, or even kicking. The recipient of such activities may receive direct physical pleasure or masochism from knowledge that the play is pleasing to a sadistic dominant.