I'm really surprised that the rough housing has started already. DS1 is way to rough with DS2 and I am constantly telling him to stop, be gentle, stop pulling on him. My biggest problem is that DS2 is laughing the whole time and no matter what I say as long as DS2 is laughing, DS1 doesn't hear a word I say so I have to physically separate them. My other problem is that about 75% of the time the younger one starts it! But then that leads to the older one being too rough again. I'm tired of the constant yelling. I don't know what to do. Any advice?