Three men met at a party, and it wasn't long until the conversation got around to their line of work and what kind of cars they drove.
"I'm a veterinarian," said the first fellow, "so, naturally, I drive a white Vette."
As they smiled and nodded, the second man said, "I own a sign company, so I drive a purple Neon."
Now the third guy was suddenly quiet until he was egged on by the other two. "Well," he finally said, "I'm a proctologist. I have a brown Probe."