Smile Please

smile is a facial expression formed primarily by flexing the muscles at the sides of the mouth. Some smiles include a contraction of the muscles at the corner of the eyes, an action known as a “Duchenne smile”. Smiles performed without the eye contraction can be perceived as “weird”.

Among humans, smiling is an expression denoting pleasuresociabilityhappinessjoy or amusement. It is distinct from a similar but usually involuntary expression of anxiety known as a grimace. Although cross-cultural studies have shown that smiling is a means of communication throughout the world,  there are large differences between different cultures, with some using smiles to convey confusion or embarrassment.



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