It's not unusual for writers to look backward. Because that's your pool of resources. If you were to write something now, I bet there's a pretty good chance you'd call on your teenage years, your experiences then, stuff you learned then.
Paul McCartneyI did study Shakespeare, that was sort of my thing; I got a Literature A-level, which is my only claim to academic fame.
Paul McCartneyI like most kinds of music. So I haven't got a bag, as they say... except the big black one in the hall outside.
Paul McCartneyI'm not a great practiser at all. We were never great practisers. The Beatles would come together for about a day before we had a tour, to make sure the amp worked.
Paul McCartney