I used to get that when I first checked out as Captain on the Learjet. A young pair of somebodies would walk up to the door and one of them would look me (6'2" 175lbs white collard shirt, dark long pants and tie, black shoes - shined) square in the face and there eyes would get wide. After their ackward question I'd answer with one question: how long have you been driving a car?
Then I'd tell them how long I'd been flying airplanes* They'd usually calm down after that.... (The older pair of somebodies would never ask the awkward question. They just seemed to know.)
Now after many years of kids, airplanes and motorcycles, they are more than happy to see me (6"2" 195 lbs dark blue suit matching tie, company ten year pin, previous company's 15 year pin, BSA pin, and hat with scrambled eggs on the brim, dark shoes - still shined) at the door.
*(1976) 8-)