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.
When we were in the design studio I always was pretending like I was in a closet asking my friend before I step out into the world what do I look like? And everybody wants that honest friend before they go and go to dinner or go to an event.