Bart and Lisa: (Singing dull) Hot dogs, Armour Hot Dogs.
Grampa: Sing it like you mean it!
(Grampa plays harmonica and the kids sing it with style.)
Bart and Lisa: What kind of kids eat Armour Hot Dogs?
Bart: Fat kids.
Lisa: Skinny kids.
Bart: Kids who climb on rocks.
Lisa: Tough kids.
Bart: Sissy kids.
Milhouse: (Sticks head from the window.) Even kids with chicken pox love--
Family: Hot dogs, Armour Hot Dogs.
(Grampa stops playing harmonica.) The dogs kids love to bite!
Lisa: Doesn't this family know any songs that aren't commercials?
(Everyone except Lisa starts singing the "Chicken Tonight" jingle.)