Think about that for one second. Wouldn't you rather look more like Jude Law versus a bloated looking professional wrestler in the WWE?
You see, even if you are a little on the slim side you can still look "cool" and hip. You can wear designer clothes. You can look "GQ", etc.
?but if you put on too much muscle on the wrong places you get that ?cheesy? meat-head aura...and that is not a place where you want to be.