I asked for a guitar when I was 8 years old for Christmas. I have no idea why. I never had any guitar heroes. I still don't. But there must have been something in me because I've been playing for 30 years.
Boxing, for me, it's the beginning of all sports. I'm willing to bet that the first sport was a man against another man in a fight, so I think that's something innate in all of us.