Farmall Cub

While showing a couple a house he said: "This house has its good points and its bad points. To show you I'm honest, I'm going to point out some of both. The disadvantages are that there is a chemical plant one block north and a slaughterhouse one block south".
"What are the advantages?" inquired the prospective buyer.
"The advantage is that you can always tell which way the wind is blowing."

From "Give 'em the pickle!" by Robert Farrell