Are you sure you don’t need a list?

An elderly couple is at home and the wife sends the husband out for groceries. “Are you sure you don’t need a list?” she asks.

“I’ve been getting groceries for eighty-five years, Gertrude!” the old man replies. “I don’t think I need a list to remember to bring home a gallon of milk and a loaf of white bread.”

The old man walks out and returns an hour and a half later with six boxes of cereal in tow. “You idiot!” his wife yells. “You forgot the swiss cheese!”