Simone Smith profile image 90

What triggers yawning?


There's a theory running around my office that I yawn every time a certain person talks. Could this person's tone of voice, or some other characteristic, be causing me to involuntarily yawn for some reason?

 

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What Causes Yawning? The Urge to Yawn99

What Causes Yawning? The Urge to Yawn

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whonunuwho says

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DIYmyOmy says

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