You will bust your own balls for me

In a chilling scene, a submissive man kneels before his commanding mistress, eyes fixed on the floor. She holds a small, cold metal ball in her hand, a devilish smirk playing on her lips. With a twist of her wrist, she tosses the ball to the trembling sub, who catches it with a shaky hand. The room falls silent as he raises his arm and places the ball in a delicate sling attached to his scrotum. Breathing heavily, he begins to walk, each step a test of his endurance. His movements are cautious, each inch a challenge, as he fights to keep the ball from falling. His mistress watches, her eyes gleaming with cruelty and desire, as he struggles to fulfill her twisted command, walking a fine line between pleasure and pain.