In my opinion it is generally acceptable to maintain an aura of openess. Arms crossed or hands in pocket often imply an aura of closedness. Much is dependent on context. If you continue your research it is likely that you will adapt eventually. You dont have to feel that way, you are who you are and you choose who you are. You can allow others to modulate your thinking, modulate your self, or create a balance. I choose balance. A give and accept relationship.
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Any thing that can happen, will happen, has already happened, and is happening right now.