Helmet use is mandatory for adults here in Seattle. I don't know how common such laws are in other areas. I haven't had a bicycle since the law was introduced

Helmet use is mandatory for adults here in Seattle. I don't know how common such laws are in other areas. I haven't had a bicycle since the law was introduced - not because of the law, specifically, but I feel grouchy about the idea of being forced to wear a helmet while doing nothing more dramatic than tootling around my neighborhood, and the law has therefore helped reduce my enthusiasm for bicycling generally.