When I first started swinging a bat, I swung righty. So one time, my dad came home, and he wanted to see my batting stance. So I showed him. He says, 'You don't hit right-handed. You hit left-handed.' At that age I didn't even really think about it. Just like 'all right,' and I switched hands. He said I'd thank him later.
Prince Fielder
Time, Home, Hands 