Clamping electric wires to the exposed penis is painful itself but the main event is going to begin when high current is going to be switched on
Mistress is using balls destruction as a way to stop that man from jerking off: spread-eagle bondage, balls beating and trampling are doing the job fine
Dominatrix is wearing rubber gloves and dealing with slave's ball sack by using a set of medical clamps
Bitch is adjusting the bolts making sure steel clamp is tight enough for slave's balls to be cut off