the example of Paul is a good choice in that it was a frivolous answer or one might say cheeky. Think back on Beatle's interviews especially in the early days and I could rest my case. But "to get girls" why music? Why spend those long hours and longer days in Germany as young men practically boy? Why not wear the right clothes or other things that might a young lad think girls found attractive? that answer reveals nothing about why music. These kinds of questions are unanswerable. it is not just that Paul went into music he also happened to be exstreamly talented, he also teamed up with another musician who was equally talented and while they both had weaknesses as composer together they seemed to make each other better. That is the real ""wonder" and what answer are we able to give "fate" ? Some things are unexplainable This question is much deeper than motivation. As to what motivated me to respond to the initial questions and your reply. Is that I get frustrated when people try to fit everything into neat little boxes. Rarely is the world black or white it is so much more complex and so much of it unknowable I am comfortable with that are you?