I once rode without a helmet -in the 80's. I have a really cool dent in my head that happened 23 years ago that for some reason won't go away. The road rash I got on the side of my face was cool till they used this brillo pad thing at the hospital to get the bits of blacktop out of my skin. Feels so cool and free to ride without the helmet until you meet the road with your head.

You figure it out on your own or learn from others.