I ride 100 miles a week or so for fitness. Always wear a helmut. I recently moved to a new town. It has a college nearby (US) and was immediately struck by how

I ride 100 miles a week or so for fitness. Always wear a helmut. I recently moved to a new town. It has a college nearby (US) and was immediately struck by how many 20 somethings weren't wearing helmuts. It irritated me at first. Then I realized something else. Just how many people were riding period. And how free and happy they look riding around with the wind in their hair. I've really come around over two years and now don't wear one when I ride recreationally. I'm sure it's riskier than not but nearly all physical activity is riskier than sitting on a couch - in the short run.