I honestly don't know. I've been riding pretty much forever. The last time that I drove a car, I was working in a bar well after 2am and a friend called to have me drive his car home - got a DUI and they wanted $100 to give me my license back. I never paid the money, since I hadn't been driving for a long time before that and didn't think that I needed a car.
I remember my first bike ride - got a BMX bike that my grandmother won in a bowling tournament for Christmas. My dad and my uncle took me to the park across the street from her house, where they held the seat and ran then let go... I guess they thought that I'd magically learn how to balance. It took a long time for me to lose the training wheels after that, because I had the memory of wrecking over and over and over...