Sherlock Holmes and Dr Watson
The standard plot of these jokes is a short dialog where Watson naïvely wonders
about something, and Holmes finds a "logical" explanation to the phenomenon in
question.
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Sherlock Holmes and Dr Watson go on a camping trip. They pitch their tent
under the stars and go to sleep. Sometime in the middle of the night, Holmes
wakes Watson up and says: "Watson, look up, and tell me what you see." / "I see
millions and millions of stars." / "And what do you deduce from that?" / "Well, if
there are millions of stars, and if even a few of those have planets, it’s quite
likely there are some planets like Earth out there. And if there are a few planets
like Earth out there, there might also be life." / "Watson, you idiot, it means that
somebody stole our tent!"