What has gotten into my old dog?

Every night about this time the two of us, me and my dog, go out into the yard to relieve ourselves. I always go to the same place but he has a circuit that he follows marking several different locations. In fact, he has made it clear that he thinks I am an idiot for not claiming more territory.

This evening, for the very first time, as I was unzipping and getting prepped, he came over and stopped directly over my spot and proceeded to urinate.

I did what any male would do, I peed on his head, (then shook it off because I had no toilet paper @Dutchess_III) and he ran off. I assume to complete his circuit.

What is the deal? I realize he is trying to assert his dominance but the old fart is 14 years old and has never before jumped in front of me and gone where I go. Does he think that with age comes privilege or what? We have never had any kind of argument about alpha status yet he seems to think that he is at the very least, my equal; or he did ‘till his head got soaked.

Any ideas as to what is going on?

I guess we will see if there is a repeat performance tomorrow night.