On Saturday I had taken Prince to the dog park where I usually take him, but he developed a new habit. He lifted his leg to pee on me (luckily I caught him in time), and attempted to do it two other times. If that wasn't bad enough, he tried to do it to another guy who was there. I'm sure this is an attempt to assert dominance, so I know I can stop him from doing it to me, but what can I do about other people??? HELP!!!