The guy's ass clenches around the smooth glass dildo, taking it inch by inch, as he groans in pleasure. His hard cock bobs, leaking pre-cum, as he fucks himself with increasing fervor. The dildo's curve hits his prostate, sending jolts of ecstasy through him. He grabs his cock, stroking it in sync with his ass-fucking, his body tensing as he nears climax. With a final, deep thrust, he comes undone, his asshole pulsing as he spills his load.