A blonde walks into a shop and says to the shop keeper: "May I buy that TV please?" The shop keeper says: "Sorry we don't sell to blondes."

So the next day the blonde goes back to the shop but this time she dyes her hair red and says "may I buy that TV please?" The shop keeper says "No we don't sell to blondes."

The next day the blonde gets a face lift and dyes her hair again. She goes back to the shop and says to the shopkeeper "May I buy that TV please ?" Once again the shopkeeper says "Sorry we don't sell to blondes!" The blonde is now puzzled and asks "How did you know I am blonde????" The shopkeeper replies "Because it's a microwave oven, not a TV!!!!"