The salesperson shook his head and said, “No, we don’t sell to blondes.” So the blonde left and came back with her hair dyed brown and said: “I’ll take that tv.”
Again the salesman said: “No, we don’t sell to blondes.” So she left again and came back with her hair dyed black and said: “I want that tv.”
But the salesman still said: “No, we don’t sell to blondes.” Finally the blonde got fed up and said, “That’s it! How’d you know I was a blonde?!” she asked. The salesman answered: “Cause that’s a microwave.