4. Super-Eating
Superman's cells absorb all their energy and nutrients from the Sun's radiation. He doesn't need to eat. But he's Superman, and if he needs to, he can Super-Eat. Who the hell is going to tell him that he can't? In Superman # 133 (1959), Clark Kent is accidentally exposed to Kryptonite and faints in front of Perry White and Lois Lane. Mind racing, and desperate to hoodwink White and Lane (disproving that he's Clark Kent is basically what Superman did every single issue in the 50s. It's practically his job) he drags them to a restaurant, telling them that he fainted out of hunger. After wolfing down a five-pound steak, Superman mind-boasts that, if necessary, he could consume everything in the restaurant. He can super-eat. But where would the food go? Is his metabolism super fast? But surely the food would build up inside him? Would he have to use the bathroom in between every chew? Either way, the writers wanted to make sure that the reader realises that every single solitary thing that Superman does is the 'super' equivalent of that thing. What next? Super-carpentry? Super-wall-building?