Blake's Latest Incidents

Just so everyone knows, Blake is 4 yrs old and my main troublemaker! ( my other children are all this way from the time they turn 2 til they reach 5 yrs) So most of my venting will be caused by him for now. Tonight he ran out of the house as fast as he could. I knew something must be up by the speed by wich he was traveling. Ethan was close behind him but stopped long enough to tell me that Blake had given himself 2 haircut and peed in the trash can in the bathroom. I thought we were about finished with his little naughtyness now. He's been a pretty good boy the last week or two. I guess now I remember why I don't normaly take the boys into get their haircuts done by someone professionally since this is what happens a week later...money down the drain! And the whole peeing thing??? I don't get it...it must be some kind of a thrill to boys that they want to mark their territory or something. Sometimes I feel like I am constantly remionding the boys the they should use the bathroom in our house to go pee (it is what its there for) and not go outside to pee on various trees. Blake even like to pee in different areas of the house as well- I just don't understand this? A couple weeks ago he peed all over the clean pile of sheets and sleeping bags by his bed. Anyone have any advice for me about this or am I going to just have to hope he grows out of this stage soon.