This exchange always killed me:
"Jebediah Springfield: People, our search is over! On this site we shall build a new town where we can worship freely, govern justly, and grow vast fields of hemp for making rope and blankets.
Shelbyville Manhattan: Yes! And marry our cousins.
Jebediah Springfield: I was- wha... what are you talking about, Shelbyville? Why would we want to marry our cousins?
Shelbyville Manhattan: Because they're so attractive. I... I thought that was the whole point of this journey.
Jebediah Springfield: Absolutely not!
Shelbyville Manhattan: I tell you, I won't live in a town that robs men of the right to marry their cousins! "
Actually, that whole episode, "Lemon of Troy" is golden.
Milhouse: "I thought you said you could read lips?"
Bart: "I assumed I could."
and
"And with that, a mighty cheer went up from the heroes of Shelbyville. They had banished the awful lemon tree forever, because it was haunted. Now let's all celebrate with a cool glass of turnip juice."