In the cold, stark confines of his cell, an anonymous prisoner finds solace in the warmth of his own massive cock. His huge, veined member throbs with pent-up lust, aching for release. He grips it firmly, stroking the length with practiced ease, his balls tightening as he nears climax. The cell echoes with his ragged breaths and the slick sound of flesh on flesh, the only company his own desperate need.