A bound submissive, his arms stretched taut and secured to a sturdy frame, awaits his mistress's pleasure. She enters, her heels clicking on the cold floor, her voice echoing as she announces, "I will bust your balls for as long as I please." She starts with a firm, unyielding grip, her fingers like a vice around his vulnerable sack. She twists, pulls, and squeezes, her eyes gleaming with satisfaction at each wince and moan. This is just the beginning of his test of endurance.