Just to make sure I'm picturing it right.... he is not lifting his leg on the person right? The person bends over him and he just pees?

Our cocker had the same problem so what we ended up doing was we told everyone who came in the house to ignore her and not bend over her, or pet her. Once the person came in the house and was settled, she settled down enough to let them pet her without peeing all over the place. Hers was more of an excitable peeing though as opposed to submissive peeing.

Funny to think now what it must have seemed like to everyone who came over and entered the house amidst shouts of "Don't touch the dog!" LOL

She too eventually got over it.