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How to be sensitive to other people's feelings
Pay attention to the person's face.
The face is the part of the body that is most likely to show emotions. If you're trying to determine whether someone is sad, upset, lonely or otherwise in pain, start by looking closely at the person's facial expression.
Unlike some social cues, the seven basic facial expressions are said to be universal in expression across all cultures. These expressions are joy, surprise, contempt, anger, disgust, sadness, and fear.