Height & Muscle Draining

We're at the gym, I'm just doing a stretch and spot you. I ask if we could have a little sparring session, you've been doing it much longer than me and might be good to get some tips. You ask if it's a good idea etc, and I eventually convince you. We start and I soon get frustrated I'm not performing as well as I would like, I hurt my hand on your abs, but carry on. I eventually have enough and point my finger at you, instantly you shrink slightly, in height and muscle. You're in shock but I carry on sparring. You start complaining, which only spurs me on to do it again, shrinking you some more, making me gain your height and muscle. I'm loving my new body, and humiliate you. I carry on sparring, hurting your little body, your moaning just keeps spurring me on to drain you more and more, I surprise myself with how far I take it.