Short joke...

[Evil Chris]

Doctor Bob had slept with one of his patients and
had felt guilty all day long. No matter how much he
tried to forget about it, he couldn't. The guilt
and sense of betrayal were overwhelming.

But, every once in a while he'd hear that soothing
voice, within himself trying to reassure him: "Bob,
don't worry about it. You aren't the first doctor
to sleep with one of their patients, and you won't
be the last. And you're single. Let it go. . . . "

But invariably the other voice would bring him back
to reality:

"BOB, YOU'RE A VETERENARIAN!!!