Two rednecks, Zeb and Buford, pull in at a gas station to fill up their truck and notice a sign that reads:

ENTER HERE FOR A CHANCE AT FREE SEX!

They wander inside and ask the attendant how to enter. The attendant tells them that they have to guess a number between one and ten.

Zeb scratches his head and guesses, "Three. "

The attendant says, "Sorry, but the number is seven."

Buford thinks for a second and says, "I'm a-gonna guess it's a six."

The attendant says, "Sorry, but the number is four."

As the two of them are driving away, Zeb says, "You know what, Buford? I think that contest was rigged."

"Naw, it's on the up and up," Buford replies. "My wife, she won three times last week."
.
.