Our horny gay masturbator, alone and uninhibited, decides to indulge in the taboo pleasure of urethral sounding. With a naughty glint in his eye, he lubes up his monster cock and a thin metal sound. Slowly, he inserts it, hissing at the initial invasion, but soon, his moans fill the room. He strokes his cock in tandem with the sound's movement, his pleasure building to a fever pitch. His balls tighten, and with a final, guttural groan, he cums, his urethra pulsing as it releases his pent-up load.