Two men saw a sign outside of a gas station: "Fill up to enter our contest & win free sex!"They filled up their tank and went inside to pay."How do we enter?" asked the first man."Well, I'm thinking of a number between one and 10," said the attendant. "If you guess right, you win free sex.""OK, I guess seven, " said the first man."Sorry, I was thinking of eight," replied the attendant. "Come back soon and try again."The next week, the two men returned to the same station to get gas. When they went inside to pay, the second man asked the attendant if the contest was still going on."Sure," replied the attendant. "I'm thinking of a number between one and 10. If you guess right, you win free sex.""Two" said the second man"Sorry, I was thinking of three," replied the attendant. "Come back soon and try again."As they walked back to the car, the first man said to the second man "I'm beginning to think this contest is rigged.""No way," said the second man. "My wife won twice last week."