A motorcycle passed on my left when I was driving home that day. And I caught a glimpse of a middle-aged man riding the motorcycle with his child sitting behind him. Apparently, the father was sending his son to the kindergarten. What kept me absent-minded (after that) was that there was only one helmet, which is worn by the father. His son was only looping his arms loosely around his father's waist. Though it is not difficult to spot motorcyclists/ pillion passengers on two wheels without their helmets but...
Let me put it this way: If you were the man, would you have you or your child to put on the helmet?