In the throes of solo masturbation, our anonymous lover explores the erotic allure of urethral sounding. With a glistening cock and a racing pulse, he meticulously inserts a sleek metal sound into his urethra. The toy's cold, smooth surface sends shivers down his spine, the pressure building as it reaches his prostate. His hand flies over his rigid shaft, the dual stimulation pushing him closer to the point of no return. With a final, desperate pump, he erupts, his body wracked with pleasure as he coats his stomach with hot, sticky cum.