Good News, Bad News

"This house," said the real estate salesman, "has both its good points and its bad points. To show you I'm honest, I'm going to tell you about both. The disadvantages are that there is a chemical plant one block south and a slaughterhouse a block north."

"What are the advantages?" inquired the prospective buyer.

"The advantage is that you can always tell which way the wind is blowing."