“I can’t do that!” he gasped.

“Why not?” I asked.

“My dad never eats fries. And he’s the strongest man in the world.”

I bit my tongue. I ordered a side of fries, and as I ate a few I explained to my son that extremes of behavior are not the best approach, especially with eating, and that for a growing boy of 10, who is underweight and actively involved in several sports, a French fry now and then is a good idea.