One day, a blonde decided to buy a TV. So she entered a store, pointed to the one she wanted, and said,"Can I buy that TV?". The clerk replied,"No. We don't sell to blondes". So the woman left.
The next day, she came back with a brown wig on, pointed to the same one, and said,"Can I buy that TV?". Again, his response was,"We don't sell to blondes.". So she left again.
The next day, she tried again with a red wig. But he still said,"We don't sell to blondes.". This made her mad. "How do you know I'm a blonde?!" she demanded. "Because," he replied calmly. "That's not a TV. It's a toaster."