Psychedelics did it for me, I was looking for fun but as an unintended consequence I became much more extrovert.
Of course, don't actually do hard drugs without medical supervision. You are more likely to end up worse off. A counter anecdote, a friend of mine who was really extroverted is now pretty shy and nervous in social interactions after suffering a few psychotic episodes during one of our drug binges.
Of course, don't actually do hard drugs without medical supervision. You are more likely to end up worse off. A counter anecdote, a friend of mine who was really extroverted is now pretty shy and nervous in social interactions after suffering a few psychotic episodes during one of our drug binges.