the logical song

A six year old child,
walking on the Manly beachfront with her mother,
suddenly points and cries out "Look, a fairy".

Her mother, seemingly at the end of her domestic tether, snaps "Don't be silly". And then she delivers the crunch line: "There's no such thing as fairies."

So the child, a stray in the backwoods of rationality, is brought up to see the world in the prosaic terms of grown-ups, and forgets she ever saw a fairy. Eventually fairies walk around unseen any more.