Got the blues?

Hmm, I'm going to be officially "middle aged" tomorrow and time to pause for thought. Some question I can never find answers to;

  1. If it's the "secret service", how come we all know it exists and what it does?
  2. Why is an insurance companie's "best quote" always changable when you give them the best quote you've had?
  3. Why do some people think the UK motorway system have slow, fast and overtaking lanes?

Any answers gratefully received, and/or new questions.