This is, of course, a pretty stupid joke, but I knew guys who were so horrible at cooking that they would literally do something like that. When I saw that I just burst laughing thinking of one guy in particular.
I roommated with a couple guys a while back (almost 20 years ago) and one of them would open a can of beans, a can of peas, a can of corn, mix it all in one big pot, warm it up and eat. Of course, sometimes, he would have something more decent, like pizza or pizza pockets or a can of soup. But his actual cooking abilities were next to zero. I am convinced, he probably didn't know how to fry eggs, but I never asked him to prove it to me.