Ralph and his friend were driving through town when they came to a red light.  Cruising through the red light, Ralph's friend expressed concern.

"Don't worry," Ralph said.  "My brother George does it all the time, and he never gets caught."

Coming upon another red light at the next intersection, Ralph again went speeding right through.

"Don't worry," Ralph assured his friend, "George does this every day, and nothing ever happens to him."

At the next intersection, the light is green, and Ralph comes to a complete stop.

"Why do you run through all the red lights and stop when we come to a green light?" asks his friend.

"I'm always afraid that George might be coming through," replies Ralph.