Hello! It’s me. Suppose you don’t know me, yet, just think of me as the neighbor who often greets you with a smile, classmate who’s never late for class, officemate who brings packed lunch everyday, textmate who doesn’t want to give asl, chatmate who refuses to show a picture, patient who forgets to go back for check-ups, co-passenger who often sleeps during the trip, lone tourist who doesn’t bring a camera, etc…