Does masturbation damage the symmetry in ones body?

I've been doing some research on this topic. I've came across something called Happeh Theory. I understand most of it is nonsense, but there is one thing that concerns me. It states that during masturbation one side of your body will clench just like the hand that is clenching the to masturbate. Excessive masturbation trains the body to always stay in a clenched and tight position. To me, that part sounds believable. The reason for my concern is, the right side of my chest is smaller and looks more clenched. However the left side looks bigger and relaxed. It's not very noticeable to the naked eye but its there. The question is: is this just my genetics or is it the result of continuous masturbation?