Why, oh why do they do it?

My boys are pushing my buttons as fast and furiously as possible. Did I do this to my mom at the end of every summer or is it strictly a boy thing? They're driving me crazy with the fighting and put downs. I wonder how many times I have to tell them "DO NOT lay your hands on your brother!!!" before I get results. All I get now is, "I forgot" or "But he looked at me!" UGH! :::::only 6 more days, only 6 more days::::: I *think* I'll make it but it is questionable.