Blonde and a Microwave

A young blonde woman walks into an appliance store and says,
''I'd like to buy that TV''

The employee says
''Sorry I can't sell that TV to blondes.''

So she goes home, dyes her hair red and says
''I'd like to buy that TV.''

The employee says,
''I can't sell that TV to blondes.''

So she dyes her hair black, goes back and says
''I'd like to buy that TV.''

Once again the employee says the same thing.

The blonde says
''I've tried to buy that TV 3 times!
How did you know I was blonde?''

The employee responds,
''Because thats not a TV, that's a microwave'''