Grandpa: "I'm an old man, no one listens to me."
Lisa: "I'm a young girl, no one listens to me."
Homer: "I'm a white male aged 18 to 49, everyone listens to me, no matter how dumb my suggestions are."
He then goes to the cabinet and takes out a can of food titled, "Nuts and Gum: Together At Last"
Episode: The one where Lisa invents an alternative to the talking stacy-malibu doll