I was introduced to Rock n Roll at the young age of 8. My older brother was a musician also, turned me on to Santana, CCR, Cream, Black Sabbath, Beatles, Stones, etc. I was hooked big time.
I would air drum to these albums constantly. Also having taken piano lessons from age 8 to 12 helped develop my musical ear. By the time I got my first drum kit, I sat down and played it like I had played for years.
When I was 15, I asked my parents for an acoustic guitar just to plunk around and I caught on to that quite quickly! I set the drums aside and pursued the guitar. I joined a local band, but there were too many guitar players and no Bass players, so I volunteered and that was how my path to playing bass came about.
Like Tom Petty Said...
"Music is the one true Magic in the world"!