In the grimy, dimly lit gym toilet, a hairy, muscular man, his body glistening with sweat, finds himself alone with his thoughts and his throbbing desire. He unzips his pants, revealing his rock-hard cock, and begins to stroke it slowly, his other hand wandering to his hairy chest, tweaking his nipples. The sound of his heavy breathing echoes in the small room as he builds up a rhythm, his grip tightening around his shaft. He lets out a low grunt, his abs clenching as he nears his climax.