He looked at it, then put it back on his plate. "You must have little ones," he told me, as he critically inspected the cheese.
"No....why? Maybe I learned it when I was a kid, I don't know. I feel as though I've always known it. That and the process of blowing off the germs, or shaking them off, after you pick something up off the floor."
"Or running it under the faucet!"
"Yes, that's a classic fix."
"With soap and water."
"Um. I'm not sure the soap is such a good idea."
"The thing is," he said, trying to direct the conversation back to his initial point, "it's just that I've only heard of the "five second rule" from people with little ones."
"Perhaps it's just because I still am a little one."
The guys all nodded at that realization.
(slightly-related: our waiter at the Mexican place is 6' 11" -- aka six feet and eleven inches tall! Wow. He's almost two feet taller than I am. Wow.)