Tiger Woods, Larry Bird, Wayne Gretzky, a pitcher just before a game, I would imagine they all have nervous energy. But as you perform, the nervous energy dissipates and you start to relax and you start to do what you do best.
If you could sit down with Jesus, you wouldn't need anybody else. He could answer all of your questions. Instead of Einstein and Louis Pasteur and Madame Curry, you could just have Jesus and he could answer for all of them.
All guys get into music because they love music and they also want to get the girls.