A cheerful bit of nonsense logic: if the world were apple pie and the sea were ink, what would we drink? It's a riddle dressed as a rhyme, and it rewards a puzzled pause before the last line.
From Mother Goose / Nursery Rhymes (traditional). See the whole collection.
If all the world were apple pie,
And all the sea were ink,
And all the trees were bread and cheese,
What should we have for drink?
Public domain. Text from The Real Mother Goose (Blanche Fisher Wright, 1916), via Project Gutenberg. View the source edition