The Further Adventures of Super Screw (1975)

The Further Adventures of Super Screw features a nebbish with such a big dick that it drags behind him gets bitten by a dog and is run over by a truck An operation reduces it to a more normal size and after fucking a nurse he tries to fuck a gorilla The gorilla fucks him instead so the guy goes back to the hospital gets his big dick back and jams it up the apes ass until it pops out of the monkeys mouth The End