A man, roped and helpless, awaits his mistress' touch. She approaches, her heels clicking on the hardwood floor, a wicked smile playing on her lips. She runs her fingers through his hair, then grips his chin, tilting his head up to meet her gaze. "Today, we explore the beauty of pain," she whispers, before bringing her hand down hard on his cock, making him gasp. She continues, alternating between gentle caresses and harsh smacks, each impact sending waves of sensation through him, his penis throbbing and leaking in response to her expert CBT.