A little old lady is walking down the street, dragging two plastic garbage bags, one in each hand.
There's a hole in one of the bags, and once in a while a $20 bill flies out of it onto the pavement.
Noticing this, a policeman stops her.
"Ma'am, there are $20 bills falling out of that bag..."
"Damn !" says the little old lady....."I'd better go back and see if I can find some of them. Thanks for the warning!"
"Well, now, not so fast," says the cop. "How did you get all that money? Did you steal it?"
"Oh, no"! , says the little old lady. "You see, my back yard backs up to the parking lot of the football stadium. Each time there's a game, a lot of fans come and pee in the bushes, right into my flower beds!" So, I go and stand behind the bushes with a big hedge clipper, and each time someone sticks his thingie through the bushes, I say: '$20 or off it comes!' "
"Hey, not a bad idea!" laughs the cop. "Good luck!" By the way, what's in the other bag?"
"Well", says the little old lady, "Not all of them pay."
