Grandpa doc's professional demeanor fades as he handles the black twink's toned body. His heart races, his breath quickens, and his cock throbs against his pants. The twink, equally aroused, can't help but grind his ass against the doctor's fingers, begging for more. The doctor, losing control, unzips his pants, revealing his thick, veined cock. He pushes the twink's head down, forcing him to take it deep, gagging him on his grandpa-sized erection.