Your memory is a monster; you forget - it doesn't. It simply files things away. It keeps things for you, or hides things from you - and summons them to your recall with a will of its own. You think you have a memory; but it has you!
I believe that if creative people are open and generous enough when working with each other, a lot more can be learned and achieved by both parties. That's what it's all about, trying to produce the best work possible on any given project.
When I was 15 I became a full-time singer in a band. At 18 I made my first record.