This is the "gold standard" of authentic enjoyment, characterized by the engagement of muscles around the mouth and the eyes (causing crinkling or crow's feet).
Used to show friendliness or comply with social norms, this smile moves the mouth but typically does not reach the eyes. 0Smile
A smile is a universal, instinctual human expression used to show joy, connection, friendliness, or even comfort in difficult situations. While often deemed a simple gesture, it is a complex, 43-muscle action that serves as a powerful nonverbal communication tool. This is the "gold standard" of authentic enjoyment,
Smiling triggers chemical reactions that boost your well-being. What's the science behind a smile? - British Council it is a complex
A closed-mouth smile used to indicate submission or discomfort.
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