In this intense femdom session, a stern mistress commands her slave to slap his own balls. He hesitates, but her dominant gaze and stern voice push him to comply. The slave tentatively slaps his balls, wincing at the pain, but his mistress demands more. She guides his hand, increasing the force and frequency, as she watches with sadistic pleasure. His balls turn red and swell, but he continues, driven by her commands and the humiliating thrill of his own submission.