This dog has Shy Bladder Syndrome.
Unfortunately, I know exactly how he feels.
As I wrote the above, I decided to look into "Shy Bladder Syndrome" to hopefully give a link because I thought that would be hilarious. And guess, what? Google has pages and pages dedicated to it. It even has a name: "PARURESIS." Who knew? I just use the stall.
Here are some links.
(Wonder how many hits I'm going to get off of this?)
OK, after looking through a few of these things, mine's not so bad.
I still feel bad for the dog in the cartoon, though.