I've had few back and forward phone calls with a young shop assitant about whether my delivery has arrived. I met her in person in the shop originally and she is not over 20. She has recently rang to say (finally!) it's ready for collection but I realised what it was about her that annoyed me - she called me by my first name, several times.
I'm 34, so not exactly ancient (I like to think ) , and I don't quite know why it grated. But it did.
AIBU?