MUST I?

Here's a fun little story from work last night.
  1. A mom came to pick up her kid, nothing unusual. As she was about to leave, I told her "Happy Mother's Day!"
  2. Her response: "thanks, you too! You must have kids, right?"
  3. Uh, no. I'm 18. I must have a job and a high school diploma. Definitely not kids.
  4. I politely said "no, none yet!" And she laughed it off and left.
  5. I'm pretty used to people thinking I'm older than I am, so this wasn't really that big a deal.
  6. But why MUST I have kids???
  7. And what age does this woman think I am that having kids would be an absolute requirement?
  8. Happy Mother's Day!
  9. Not all women have to be mothers.