People are so used to having their lives filmed they're not even conscious of having cameras around. I still have that sort of suspicion when a camera comes out. I view it as a thing to fear.
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Of the primary emotions fear is the one that bears most directly on survival. Children show fear. Adults try not to maybe because it's shameful or in some circumstances dangerous. The fear response is automatic though and your body runs through its reflexes whether you want it to or not.