I was once carrying my orange Birkin browsing in FCUK store, a high street clothes store here. A young SA came to me asking whether I needed any help. She saw my bag and said "oh I have the exactly the same bag!" I was a bit taken aback and said "oh good for you!" and she went on to say her parents bought it for her on a trip somewhere. So I said "Oh lucky you, I had to pay for mine myself!"