Cumsoo, a master of gay amateur BDSM, explores the dark art of CBT sounding in this homemade masterpiece. Alone in his dungeon, he secures himself to a chair, eager to test his limits. He applies conductive gel to his throbbing cock, then attaches electrodes, connecting them to his e-stim machine. As the current flows, he gasps, his body tensing as he fights the urge to cum prematurely. He inserts the metal sound, twisting and pushing it deeper, his moans filling the room. His cock glistens with pre-cum, his balls tighten, and with a final, intense jolt of e-stim, he erupts, his body shaking as he coats his abdomen with his cum.