There was a time when helmets were the exception on the road and many of us put many miles in the wind before mandatory helmet laws. It wasn't a matter of being cool. The helmet has saved some bacon over the years, but I'll wager cool heads and defensive riding have been a bigger factor in keeping those of us that have seen it both ways alive than have helmets. I use a helmet now and more than likely always will. Not by choice, but due to a law and that's the crux of the issue. It should be a choice, not a mandate. You can't save me from myself forever.
