The paddle, a heavy, solid piece of wood, feels like a extensions of his arm as he brings it down with a resounding smack onto his waiting ass. The impact sends waves of pain and pleasure coursing through his body, his cock stiffening in response. He grips the wall tighter, bracing himself as he continues to punish his flesh, the thwack of paddle against skin echoing in the room. His ass, now a deep, angry red, bears the marks of his self-inflicted discipline, each one a badge of honor, a testament to his endurance.