We addicts (I mean enthusiasts) have long known that motorcycling makes you smarter. Here is some proof for that position.
http://www.motorcycledaily.com/10march09_sharp&soft.htm.
Now, I also realize that for many years some of us had practices that tended to reduce the number of those smarter brain cells (sometimes resulting in mounting wheels backwards and wondering what went wrong) and some are still active in those cell reduction practices so as not to seem too smart for the average population.
Feel free to add your own thoughts, but let's not take the rocket scientist route with this.
Have a great weekend!