Going through airport security today, I noticed that the man in front of me, an older gentleman who was dressed up in a beautiful suit, was having trouble removing his extremely high quality shoes.
Then, after we had gotten through, I saw that it was also taking him quite some time to put his shoes back on.
I said to him, “You know a great way for somebody to make a lot of money, with all this crazy security? Make invisible shoes.”
He thought about this for a moment. “But if they were invisible, you wouldn’t even need to take them off.”
“Yes,” I said, “exactly!”