Oh yeah...I have had my share of those comments, 90% of which were before my 2001 diagnosis with AS (I improved significantly since then, and can pass off as NT to all but the most sensory-perceptive people...mostly female). I'm a guy in my 30s, and while now people address me as "sir", I found that ever since I was 18, people in shops and public places called me "sir", even people about my own age. It's as if they picked up on something about me, that I had a rigid or formal aura or something, so I wasn't one of them. It really bothered me, and I remember my peers saying that, one day in their mid-20s, somebody called them "sir"for the first time. I didn't mind people calling me "buddy"or "fella"or whatever slang, in fact, I preferred they would, but it didn't happen as much as I would have liked. One time, I remember that I was browsing around in a bookstore, I had just turned 20, and a salesperson in her 60s said "you look puzzled Sir, is there something that I might be able to help you with?" she said it in such a way that I was lost, not that I was looking for what title or whatever.
Get this though - this will give you a chuckle - at the age of 24 (before my diagnosis) I went to a psychic fair in my city, and paid $20 to some 60-something female psychic (who looked like a gypsy BTW!!) to tell me something about me that I didn't realize, that I sometimes don't think that I truly understand myself...her response? "You seem like a highly intelligent young man, you have a good heart, but I sense you are awkward by nature and do not know what to say to people, you would not be a good salesperson but you could excel in [insert academic or intellectual field] and that you are desperate for people to really understand you, but you need to give them space and not be too forceful to belong." WELL, being somewhat naive, I thought she was quite insightful, but the reality was that at that stage of my life, several people could have told me that.