I was wondering this same thing until two weeks ago. My guy always squatted, which was fine but...Sometimes he would pee on his front legs. About two weeks ago we were out for a walk, and he very awkwardly lifted his leg towards a tree. Since then, we would lift and pee on something a couple times in a walk. Yesterday he seemed to have the lift and pee perfected. He has the placement and timing all down now, I barely have to slow my stride. He is 8-1/2 months now. When just going pee he squats, but when we are out on the town, he will lift to mark. He has yet to lift on the house, car, my own shrubs, etc...