Q: What's yellow, and equivalent to the Axiom of Choice?
A: Zorn's Lemon.
Q: What's yellow, and complete?
A: A Bananach space.
Q: What's yellow, and has a convergent power series expansion?
A: A bananalytic function.
Q: What's purple, and commutes?
A: An abelian grape.
Q: What's purple, commutes, and is occasionally worshipped?
A: A finitely-venerated abelian grape.
Q: What's non-orientable, and lives in the ocean?
A: Möbius Dick.