When my mother had a stroke 6 years ago, I met a woman which was in the same hospital ward as my mother.
That woman had had a fall with her bicycle. She hit her head and not being able to remember - or do - the most simple everyday doings, was just one of the consequeces of her fall.
I don't know whether she wore a helmet, but I don't assume she did concidering the damage to her brain.
To wear a helmet when I bike, is not a thing which I can boast with! (My dear - and more courageous - sister already has one. Well done, Lotte!!)
I, however, have 100 excuses not to have one, whenever my children have asked why I don't have to wear one.....(It's too warm, it's too clumsy, it doesn't fit properly, it's not smart, it makes your hair fuzzy - you name it!)
But I must admit that lately I have actually considered to buy one - the point of wearing one is crystal clear:
And I do love my brain......

...and the helmets are not that bad looking anymore - they even come with dots, flowers and stars! The shape is rather smart as well - like a skater helmet.
Now all I have to do, is to get up my courage.....