True smile and Fake smile

 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.