Hey #YoungSheldon & #BigBangTheory fans—there’s a tiny habit of Sheldon Cooper’s (“knock, knock, knock—Sheldon!”) that you’ve seen a hundred times. But did you know the behind it? It’s not just about quirkiness—it goes deeper.
On The Big Bang Theory Sheldon always knocks three times, says the person’s name three times, then enters.
Series writers say the knock began as a comedic bit—writer Lee Aronsohn created it as a funny pattern.
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