A tramp put the finger on a banker as he was coming out of  his office. "How about a dime for coffee?" he asked.

"Here," the banker said. "Here's 50 cents. Go buy yourself  five cups of coffee."

The next day, as the banker was coming out of his office  again, the same tramp came up and punched him in the nose.

"Hey," yelled the banker, "is that any way to treat me after I gave you a half-dollar?"

"You and your lousy five cups of coffee," the tramp  snarled, punching him in the nose again. "They kept me  awake all  ight."