I Want Nothing

Me: “Phineas, would you like some lunch?”
Phineas: “No.”
Me: “Maybe some chicken? Or ham?”
Phineas: “No.”
Me: “Or cheese?”
Phineas: “No. Whatever you say, I’ll say ‘no’.”
Me: “Cookies?”
Phineas slowly turns and looks me directly in the eyes: “No.”