A lanky teen boy, alone in his room, discovers the power of thought over his stiffening cock. He mentally wills his thick, uncut dick to rise, and it obeys, standing at attention. He strokes it gently, feeling the vein pulse with life. His mind races with dirty thoughts, and his hand moves faster. Pre-cum leaks from the tip, and he spreads it around, lubricating his tight grip. He grunts, feeling the pressure build, and with a final, swift jerk, he explodes, cum flying across the room.