I took BART (the San Francisco subway) recently and as I waited for the train, I noticed a small boy and his dad negotiating about the appropriate way to interact with the escalator.
“Stop touching it and putting your hand in your mouth!” he said exasperated. “It’s a health hazard!”
“At least he’s not licking the handrail, right?” the dad said to me a little embarrassed.
The little boy looked at me shyly.
“It’s tempting, isn’t it?” I said.
And he giggled and said, “Yep.”