Lettuce in jokes
Knock, knock.
Who's there?
Lettuce.
Lettuce who?
Lettuce in and I'll tell ya.
Knock, knock. Who's there? Iceberg lettuce. Iceberg lettuce who? Iceberg! Let us in!
Knock, knock.
Who's there?
Lettuce in.
Lettuce in who?
Lettuce in, it's cold out here!