A blond is feeling really smart one day, so she dyed her hair black and drove into the countryside. She sees a sheep farm and says to the farmer, "Those sheep are so cute! If I can guess exactly how many you have in that field right now, can I have one?" Certain that she can't guess, and somewhat hypnotized by her beauty, the farmer agrees. She looks at the field for a few moments and then says, "Mm, how about... 86?"

The farmer says, "Wow! You got it right. Go ahead and take one" The blond returns with the animal and just as she gets into her car, the farmer says, "If I can guess what color your hair actually is, can I have my dog back?"