A hobo comes up to the front door of a neat looking farmhouse and raps gently on the door. When the farm owner answers, the hobo asks him, "Please, sir, could you give me something to eat? I haven't had a good meal in several days."
The owner says, "I have made a fortune in my lifetime by supplying goods for people. I've never given anything away for nothing. However, if you go around the back, you will see a gallon of paint and a clean paint brush. If you will paint my porch, I will give you a good meal."
So the hobo goes around back and a while later he again knocks on the door. The owner says, "Finished already? Good. Come on in. Sit down. The cook will bring your meal right in."
The hobo says, "Thank you very much, sir. But there's something that I think you should know. It's not a Porsche you got there. It's a Mercedes."