Marge: The police have such a strong case against Homer. Mr. Burns said
he did it, they have Homer's DNA --
Lisa: They have Simpson DNA! It could have come from any of us, except
you, since you're a Bouvier.
Marge: No! No, no, when I took your father's name, I took everything
that came with it -- including DNA.
Lisa: [giving up] OK, Mom.
-- Marge, literal-minded,
"Who Shot Mr. Burns? Part Two"