#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