What causes that ‘satisfying’ feeling at the apex of a yawn?
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Your face and mouth has very many muscles, and you stretch a lot of these muscles when you yawn. Our muscles like when we give them tension and then releasing this tension feels good for our muscles.
Your face and mouth has very many muscles, and you stretch a lot of these muscles when you yawn. Our muscles like when we give them tension and then releasing this tension feels good for our muscles.
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