Alone in his dungeon of desires, a dominant male explores the darkest recesses of his anatomy. With a wicked grin, he lubes up a hefty metal rod and inserts it into his urethra, groaning at the intense, taboo sensations. He strokes his engorged cock in tandem, feeling every ridge and vein as he plunges the sound deeper. His body trembles with pleasure, sweat beading on his skin as he brings himself to the brink of a powerful, piss-soaked release.