I think most of my friends would agree, I am an extrovert, in at least a moderate degree.
I love to share. Share my passionate cravings for food, my courage in exploring the unknown and fear in bloody movies, my accomplishment in school and my frustration in career, my hobby to cook and eat and dance and sing, my unexpect surprise in travelling, my advice on my "expertise" and embarassment, my friends, my family..
But all the time, there are things that I do not want to share, or worse, that I do not want the person I share with to share with someone else. At you point, you might say.. "DAH! no one wants their secrets to be spread around."
But do not get me wrong, things that i am referring to are not those big private secret or gossip, but "little things" that is simple like my favourite place for day dreaming, my most random millionaire plan, or just a casual habit ...
When those "little things" are accidentally brought up to the strangers, I would just have a tickling feeling like the magician's magic trick is revealed in front of the audience.
Magic is no magic anymore when its trick is revealed.