A blonde woman wants to prove she is smart.

So she dyes her hair brunette and goes out for a challenge. She finds a shepherd with a big herd, and asks him if she can guess the number of sheep in the first try and if she guesses right she could keep one of the sheep. The shepherd agrees. After a good look at the herd she thinks and tells him: 258. The shepherd in amusement that she guessed the right number, agrees to give her a sheep of her choosing. She takes another look, grabs one she liked and starts to proudly walk away. Then she hears the shepherd calling her, she turns around and he asks her: If I guess the natural color of your hair, would you give me my dog back?