#Introvert vs #extrovert #differences. Nobody is 100% one or the
  other. Still I'm glad someone found some chemical diffs.
  #Science
  [vine id = "OMrZwwlmYYz"]
  #Introvert vs #extrovert #differences. Nobody is 100% one or the
  other. Still I'm glad someone found some chemical diffs.
  #Science

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