I'm one of those people. I joined the Marines in 2005 and have still never been in a non-sparring fight at 33 years old. Given sufficient training, I think it could be preferable. When training with rifles/pistols, the people who'd never used a gun before usually did the best because they didn't have bad habits.

When I was about 6 years old, I got into an argument with a neighbouring child who hit me. I walked back over the road crying to my Dad who was working on his car on the drive. He showed me no sympathy and immediately sent me back over the road to hit the kid back. I did (I was more scared of my Dad than the other kid) and the other kid then went off crying.

Not sure I'd do the same with my son (if I had one, I only have a daughter).

I’m 46 and have never been in a fist fight. Neither have most of my friends of similar age, as far as I know. I’ve lived in Norway for most of my life. Based on what I read in Norwegian news (I no longer live there myself), it seems that fist fights and other forms of violence are far more common among teenagers now than when I grew up.