Meatball

Meatball (1972) is a comedy directed by Gerard Damiano rated 9.0/10.

Dr. Schmock, a zany mad scientist who accidentally discovers Preparation X. It's a formula that can make an ordinary meatball swell into twice it's normal size. But whenever a guy eats it, it also has a similar effect on him! The good doctor tests out his creation and ends up with a constant erection that even his sexiest assistants can't calm down.