A Veterinarian was feeling ill and went to see a doctor. The doctor asked him all the usual questions - what were the symptoms, how long had they been occurring, etc.
Suddenly, he interrupted the doctor. "Hey look, I'm a vet - I don't need to ask my patients these kind of questions. I can tell what's wrong just by looking."
He smugly added, "Why can't you?"
The doctor nodded, stood back, looked him up and down, quickly wrote out a prescription, handed it to him and said, "There you are. Of course, if that doesn't work, we'll have to remove your testicles and if that doesn't work we'll have you put to sleep."