@cak – Ah, yes! My son believes with all his heart in the sock fairy. My husband believes in the toilet paper fairy. Both of them believe in the magical being that unplugs the toilet mysteriously after they have plugged it up and vanished so they won’t be blamed.
It seems to be mostly a guy thing. Girls seem to grow out of it.
My daughter, while she doesn’t replace things any better, seems to understand that I do these things because she will leave me notes telling me we are out of something, but (she has her own car and money!) will never replace it herself.