Grampa: Son, you've got to marry that girl!
Homer: Because it's the honorable thing to do?
Grampa: [slams his hand on the table] No, because you'll never do any
better. Ha ha, you lucky bum! The fish jumped right in the
boat, and all you gotta do is whack her with the oar!
-- Marge becomes pregnant, "I Married Marge"