Hubby and daughter wear full faced helmets. I think hubby laid the bike down three times (once was shoestring caught in the pedals, couldn't get his foot down on concrete, tipped over, crashed into road, bumped his head and twice was loose gravel on country roads, he was not going very fast but enough to have his helmet and bike fairing scraped). Once in a while hubby will drive without it but he is playing russian roulette.
Only ONE time he went ahead and took my seven year old daughter on the motorcycle without a helmet. I chewed his *** about it and didn't do it again. All because he didn't bring a helmet with him. I told him it does not matter, either give me a call to pick her up from school or take the horse riding helmet (better than nothing) in the van if he sees me there on the pick up lane at school.
Sure I've rode with him without a helmet but I don't feel comfortable and too leery about other drivers and so forth. I told him thanks for the ride but I'd rather ride with the helmet to really enjoy the bike ride.
Same for horses, after I got thrown into the mulberry tree, had a concussion and broken thumb....I'd rather ride one with helmet.