Why do we go red in the face when embarrassed?
Humans seem to be the only animals to show embarrassment, and Charles darwin called blushing “the most peculiar and most human of all expressions”. A 2009 study by dutch psychologists found that we are more likely to give people a second chance if they blush when they betray us. the ability to blush acts as a signal that you are sensitive to the social rule you have just broken. Psychopaths, on the other hand, do not blush at all.
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