Two men meet in a bar:

·      Hi Jack!
·      Hi Joe! You can’t believe what I just saw! The local gasstation is doing a competition, a really nice one. Every time you fill up your tank, you have the chance to win free sex!
·      Whoa, that’s great

So Jack drives to the gasstation, fills up his tank pays and asks the owner:

·      So I hear I can win free sex
·      That’s right sir, just guess the number between 0 and 10 I have in my head.
·      6!
·      I am sorry sir, that isn’t correct! Better luck next time.

5 days later Jack goes there again. He fills his tank and goes to the counter.

·      So about the free sex …
·      Ok, guess the number!
·      2!
·      I am sorry sir, that isn’t correct! Better luck next time.

The following week and after 3 more tries, Jack meets Joe again in the bar

·      I think that man is pulling a trick, you can’t win that prize!
·      But yes you can, Jack, my wife went 3 times already, and she guessed the number every time!