From another thread: I've never heard this before, and I don't believe it is true. So, an non-scientific survey. Please, only vote if you wear a helmet regularly though not necessarily for every ride. For the record, I often wear a helmet, I learned to ride under compulsory helmet laws and do not believe they should be compulsory. There's a whole other thread to discuss compulsion, this thread is to see if the attitude of helmet wearers skews as the above quote suggests.