Sigmund Freud is explaining to a colleague the connection between fear and sex in human relationships. The colleague asks: “What comes between fear and sex?” Freud replies: “Fünf.” (source)
Why fear is reasonable when I cross a bridge – it mitigates risk, even though it’s unpleasant.
Looking at what’s beneath the bridge, I fear for my integrity, so I pay attention.
Fear might not be a good feeling, but it saves the day.