Mistress Amanda is furious that her slave has been trying to cheat by contacting other Dommes. She decides he needs a lesson in control, so she tells him that if he can resist cumming she will let him go - but if he cums, he will lose his balls! The slave tries to resist, but is soon spurting his cum into the hand of the laughing Amanda. She gets her burdizzo, a veterinary castration tool, and is soon clamping it down on his balls, laughing as he screams.