And a few people on bicycles who wear helmets make the most extraordinary claim that helmets do *EVERYTHING*.

And a few people on bicycles who don't wear helmets make the most extraordinary claim that helmets do *NOTHING*.

And a few people who sometimes wear helmets and who sometimes don't wear helmets want everyone to wear shower helmets, and automobile helmets, and stairway helmets, and walking helmets, and....

-mr. bill