The teen's big dick twitches with anticipation as he begins to stroke it, the sensation sending waves of pleasure through his body. He grips it tightly, feeling the veins bulge and pulse with each movement. His other hand cups his balls, massaging them gently as he continues to pleasure himself. His breath comes in ragged gasps, his body tensing as he gets closer and closer to the edge. With a final, powerful stroke, he comes undone, his cock throbbing as it releases a thick stream of cum onto his stomach.