The Devil and the Fly

The devil is like a fly. While someone cooks in the kitchen, someone else goes out of the door. Upon opening the screen door, a fly (attracted by the smell of the food cooking) comes in. The cook gets angry at the other person for opening the door. The other person tells the cook, it's the food that brought in the fly. So they start to argue and fight. All the while they forget that the only solution is to let the fly out or just swat it.