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Q: Why don’t permutations live in suburbs?
A: They don’t commute.

Q: What’s purple and commutes?
A: An Abelian grape.

Q: What happens if you ferment a bunch of Abelian grapes in a Klein bottle?
A: You'll make an Algebraic Topologist whine.

Q: What's purple, commutes, and is worshipped by a small cult of followers?
A: A finitely venerated abelian grape.