Meatball (1972)

Give me liberty of give me "meatball".

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.