Ballbusting is an extreme form of BDSM play that involves the dominant partner inflicting physical pain on the submissive. This can include squeezing or punching of testicles, slapping, and other forms of humiliation. It is common for ballbusting to be combined with other forms of BDSM activities such as bondage, sensation play, and role-playing. Ballbusting can also involve more intense activities like kicking and choking.