Three-Roommate Problem
Two roommates beside a sink full of dishes joke that a third roommate would make chores as unsolvable as the three-body problem.
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Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2018-08-20-three-roommate-problem/ (CC BY-NC 4.0)Transcript
A: "I was thinking — should we get another roommate?"
B: "Ugh! And make the question of who should do the dishes completely unsolvable?"
A: "Um... I don't think the three-body problem applies to household chores."
B: "True. With chores, even the two-body problem is impossible."