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...and I have a brown Probe."