The showerhead cascades water down his back, as he reaches down to grip his hard cock. The shower gel makes his foreskin slide effortlessly, a sensation that sends shivers down his spine. He imagines the girl from his math class, her smile, her laugh, her curves. His strokes become more urgent, his body tensing as he feels the familiar build-up. Hot water pounds against his back as he fucks his fist, his breath coming in short gasps. With a final, shuddering stroke, he comes, his cum mixing with the water swirling down the drain.