For a good yawn I need to really open my mouth and push/strain my jaw muscles. If that doesnt happen, then the yawn feels incomplete to my body and it happens again and again till it works "right"

What is the reason/body function behind that?

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[–] [S] 6 points 1 week ago

I mean, when I see videos of animals yawning, like lions, I get the urge myself to yawn. So definitely a complex topic.

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