An old guy and his son had a one-mule farm where they eked out a living. One day, the son hit the lottery and won $50,000. He rushed into town, collected his money, then hurried back home, where he told his father the good news, and handed him $50 bill.
The father looked at the money for a moment and then said, "Son, you know I've always been careful with what little money we had. I didn't spend it on whiskey or women. In fact, I couldn't even afford a license to legally marry your Ma."
"Pa!" the son exclaims, "do you know what that makes me?"
"Sure do," said the old guy fingering the fifty-dollar bill. "And a pretty cheap one, too."