His hand moves like a piston, pumping up and down his rock-hard shaft, as he grips it tightly. The friction is intense, the pleasure bordering on pain. He's lost in the moment, his eyes closed, his mouth open in a silent 'O'. His balls tighten, his orgasm building, as he continues to stroke himself faster and faster. The room is filled with the scent of sweat and sex, and the sound of his ragged moans as he finally finds his release, his cock pulsing in his hand.