I am very shy and reserved...
I find it extremely difficult to approach new people and strike up a conversation, because I'm so preoccupied with the inner thoughts that keep buzzing round my head. Not having any innate ability to start conversations, think of suitable topics or connect with near-strangers, I'm always at a serious disadvantage. Because of this, I tend not to approach new people and hide behind my more socially aware friends.
Once you get to know me, things change. But I am still usually the person who says the least in any social situation. Maybe I'm just selective with my words.
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"Never try to teach a pig to sing. It wastes your time and annoys the pig."