My standard response on the "I don't wear a helmet" threads.
I friend of mine, Harley rider, no helmet. He hit some sand at less than 5MPH, hit his head on the ground. His girlfriend, who was wearing a helmet, jumped up and asked if he was OK. He was dead before the ambulance got there.
Anyone that rides with their child and makes their child wear a helmet while they don't wear one.....well....probably doesn't really need a helmet. They are there to protect your brain.