I was once in Marseille, where there is a big Ferris wheel in the port. My friend and I bought tickets to ride it at a kiosk, then walked up to the attendant c

I was once in Marseille, where there is a big Ferris wheel in the port. My friend and I bought tickets to ride it at a kiosk, then walked up to the attendant checking tickets, who was standing directly in front of the Ferris wheel. The attendant took our tickets, ripped a small notch on them, and then gave them back to us. My friend asked, “What was the purpose of ripping the tickets and giving them back to us if we immediately get on the ride now?” The attendant answered: “So you would ask me why I ripped it.” The moral of this cryptic story being: the purpose of the fence may simply be to remind you to ask why it’s there.