In a private, dimly lit chamber, a skilled individual explores the limits of self-pleasure with a sleek, tapered sounding rod. The tool's smooth, curved surface glides expertly into the urethra, stretching and stimulating with each precise movement. The solo artist's moans fill the room as the rod reaches deeper, each thrust sending waves of pleasure through his body. As the intensity builds, the rod's unique shape massages the prostate, pushing the artist closer to the edge. Finally, with a final, deep thrust, he finds release, cumming hard as the rod fills him completely.