Reciprocity is an all-purpose relationship tonic. Used properly, it strengthens, lengthens, and rejuvenates social ties. It works so well in part because the elephant is a natural mimic. For example, when we interact with someone we like, we have a slight tendency to copy their every move, automatically and unconsciously.28 If the other person taps her foot, you are more likely to tap yours. If she touches her face, you are more likely to touch yours. But it’s not just that we mimic those we like; we like those who mimic us. People who are subtly mimicked are then more helpful and agreeable
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