On cleaning one's room
My wife: Alex, go clean your room.
My son: It's no use Mom.
My wife: Why not?
My son: Because, in order to clean my room I will have metabolize food. In the process of metabolizing the food, I will both break down the inherent molecular order in the nutrient molecules, and I will generate a large amount of heat which will randomly displace molecules in my room and elsewhere. In fact, the world will be a much less ordered place when I am done cleaning my room than it was before I started. Therefore, it is no use to clean my room.
This is what happens to children who grow up under the influence of a physical chemistry professor. Not a pretty thing. Fortunately, my wife does not believe in the second law of thermodynamics. In fact, she finds the concept rather abhorrent.
My wife: Alex, go clean your room, now.