"It's something productive for you to put energy into as opposed to something like swiping a wallet from someone's desk or tagging the outside of a building." Her chastisement was met with one of your blows to her legs. She was trying to spar with you and mold you into a better person and her first attempt was simply getting you a hobby or something to redirect negative energy into "Some people say to use joy or just sheer force of will but it's alright to put anger and rage behind your punches. As long as you don't let it blind you. Am I making sense?" She returned a blow in the form of a quick jab to your shoulder "I'm not saying you have to be happy-go-lucky, but it's easier than keeping a bunch of rage or sorrow bottled up inside you." After speaking, she dropped low and swept your leg with a quick fluid motion before offering you a helping hand "And it's healthy and helps you get muscles. You're young, putting meat on your bones isn't a terrible thing."