In the quiet of his room, a man, uninhibited and alone, indulges in the primal pleasure of self-gratification. His uncut cock throbs in anticipation as he strokes it to full, veiny hardness. The room fills with the sounds of his满足 (content) moans and the slick, wet rhythm of his hand working his length. He teases his sensitive head, massaging his precum out, before gripping his shaft firmly and pumping vigorously. His body tenses, muscles clench, and with a final, guttural groan, he releases, painting his torso with ropes of hot, milky seed.