A lone kinkster explores new heights of self-pleasure, inserting a glowing urethral sound into his engorged cock. The pulsating light illuminates his thick shaft as he strokes it, his big balls tightening with each thrust. The sensation of the cold, hard metal sliding in and out of his sensitive urethra sends waves of pleasure through his body. He masturbates furiously, the light casting eerie shadows on his face, contorted in ecstasy as he nears climax.