Cock and ball torture is one of the BDSM practices of a dominatrix that focuses on the application of pain or constriction to the male genitals, especially the cock and balls. This BDSM practice can include a host of activities known for their intensity, including genital piercing, wax play, spanking, squeezing, genital whipping, urethral play and erotic electrostimulation.

The appeal of cock and sack torture lies in its ability to elicit physical sensations ranging from pleasurable discomfort to intense pain, often in conjunction with psychological satisfaction derived from masochism, erotic humiliation or the pleasure of a dominant partner. It is important to note that several CBT methods carry significant health risks and require informed, consensual and safe participation.

Types of cock and ball torture
CBT consists of a wide range of activities, some of which are moderate and some of which are very extreme. 
Below you will find the different CBT practices:
Egg squeezing
electrostimulation
Egg stretching
Wax play and cock whipping
Cock trampling
Urethral play
Mild pain play
Extreme pain play