There was this gas station in Anderson, SC trying to increase its sales, so the owner put up a sign saying "Free Sex with Fill-up."
Soon Bubba pulled in, filled his tank, and then asked for his free sex. The owner told him to pick a number from 1 to 10, and if he guessed correctly, he would get his free sex. Bubba guessed 8 and the proprietor said, "No, you were close. The number was 7. Sorry, no free sex this time but maybe next time".
Some time thereafter, Bubba, along with his buddy Cletus, pulled in again for a fill-up, and again he asked for his free sex. The proprietor again gave him the same story and asked him to guess the correct number. Bubba guessed 2 this time, and the proprietor said, "Sorry, it was 3. You were close but no free sex this time".
As they were driving away, Bubba said to Cletus, "I think this is a scam.... that game is rigged and he doesn't give away free sex". Cletus replied, "No, it's not rigged -- my wife went there twice last week and won both times."
there doesn't seem to be anything here