The thing that pleases me the most about it is that young people like it. It's given kids from 6 to 16 an alternate view of music to what's been available for the past 20 years.

When I grew up, I listened to older stuff too, ... My own kids went through their teenage raving stuff. Then, in the last two or three years, my daughter started playing Ella Fitzgerald and Muddy Waters. There's something about music. When you like it, you want to find out where it came from.

It's kind of hard with the kids, and it's bad with him being gone. We went through some teenage trial and error this summer.

The name used for it is mad-dogging. I like to call them teenage testosterone arguments.

Only the fact that people have written about the reissue have I realized that it spent seven weeks at No. 1. At the time I did it, I can't remember even taking any notice of it.

People say I'm the Beatle who changed the most, but to me, that's what life's about.