Dr. FrankenFuck's Fist Lab

Teddy Bryce hangs upside down on the lab chair, blinking as the cold metal bites into his skin. Dr. FrankenFuck steps forward. 'Do you see this left fist?' the Doctor asks. 'Well, there’s also a right fist.' Teddy understands. He spreads his legs wide. The Doctor shoves his left arm in up to the wrist and twists inside, turning Teddy’s hole into a hungry monster. When the fist slides free, a thick, red rosebud blooms from Teddy’s ass. The Doctor pushes it back inside with his right fist. 'Monster hungry!' Teddy shouts. The Doctor answers by driving deeper, feeding the need. Teddy’s screams rise as the Doctor swaps fists, right then left, sinking past the wrist each time. When the Doctor sees Teddy lost in it, he orders him to jerk his cock. Teddy strokes in time with every punch inside him. 'Enjoy it, beautiful,' the Doctor says, yanking his fist out. Teddy shoots hard, cum splattering his inked chest, while Dr. FrankenFuck’s boots plant firm on the lab floor.