i have little idea, what that lot was supposed to show. You said that there needs to be maturity to understand the concept of violence, i think, most kids will catch on when another kid pins them to the ground and repeatedly punches them. or some such, and why do you believe. That say a 13 yo can't learn applicable fighting skill, ? if a thirteen yo ma gets into a fight why arnt his skills just as applicable as a 15 yo ma. Your whole point doesn't make sense!