Peed from WHERE??

S peed on L today - AGH! He was climbing the front tree and guess he needed to go potty and dropped his drawers right then. L was under the tree, playing. He peed all over her head. It was super gross. She comes to the front door while I am preparing dinner and says "S peed on me". I thought he must have peed on her feet or shoes. Boy was I surprised to find her head and clothes SOAKED! She showered while I tried to find S. He was still in the tree. I helpd him down then I marched him over to his father. We tried to be super mad and explain no peeing from the trees (who knew THOSE words would ever come out of my mouth). Both Daddy Piper and I had a hard time keeping a straight face while talking to him about proper places to urinate, one of those places is NOT on his sister's head!!