A gas station owner was trying to increase his sales.

So he put up a sign that read "Free Sex with Fill-Up."

Soon, a man pulled in, filled his tank and asked for his free sex.

The owner told him to pick a number from 1 to 10. If he guessed correctly he would get his free sex.

The man guessed 8 and the proprietor said, "You were close. The number was 7. Sorry. No sex this time."

A week later the man went back along with his brother and pulled in for another fill-up. Again he asked for his free sex.

The proprietor again gave him the same story and asked him to guess the correct number. The man guessed 2 this time.

The proprietor said, "Sorry, it was 3. You were close, but no free sex this time."

As they were driving away the man said to his brother, "I think that game is rigged and he doesn't really give away free sex."

His brother replied, "No it isn't rigged. My wife won twice last week."