Birthday wishes

I just got off the phone with mum...

Mum: What do you want for your birthday?
Me: Oh, nothing actually. I'm trying not to make a big fuss this year.
Mum: Why? How old are you?
Me: 27
Mum: Oh. I understand. You're worried that you're nearly 30 and haven't done anything with your life. It's nothing to be ashamed of. There are lots of people like you.
Me: Um...