We have a lot of discussions like this around our house...
Eryn: "I like macaroni and cheese."
Me: "Do you want ketchup on it?"
Eryn: "No. Ick. That's gross."
Me: "Grandpa John eats ketchup on his macaroni and cheese."
Eryn: "Why does he?"
Me: "Well, I guess he doesn't anymore. He can't eat macaroni and cheese. He can't eat ketchup either. Nevermind."
Pooteewheet: "Poor John."