A sound theory
As with any theory (or rule, or guideline, etc), there's the exception.
Adam Sandler is apparently quite the Republican, but apparently also quite the professional. He doesn't seem to let the murk of politics dim his humor. I know, plenty of people think his humor is pretty dim to begin with, but I actually think he's still got it. His "The Ridiculous 6" is a hilarious celebration of everything that's crude and wrong.