The smile may no longer be an effective
way to mask one's true feelings. Some
psychologists have claimed that true smiles
and false smiles use different muscles. For
example, in the true smile, the muscles
surrounding the eyes tighten, while the cheek
muscles pull the corner of the lips upward.
On the other hand, in the false smile, the
muscles between the eyebrows move slightly,
while the muscles around the mouth pull the
corners of the lips downward. If the psychologists'
claim is proven to be true, perhaps people will
worry less about what they say and more about
which muscles to use when they smile.
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