Ok Merlin hasn't done this for a long time. But when he was about 8 months old and just learning that boy doggies lift legs. the first time he did it , it was on the ups guys leg as I was talking to him.Thank God it wasn't the usual guy. Merlin came the closest ever to being a dead puppy as he ever has. I had to get in the house before I burst as I was actually auging with the guy about a package he left that had gotten damaged by rain. I guess Merlin just gave his opinion .