Blond

A blond walks into a shop a says to the shop keeper "Can I buy that TV please?"
The shop keeper says ''No I don't serve blonds."
So she goes home and dies her hair brown.
She goes back to the shop and says' 'Can I buy that TV now."
The shop keeper says ''No I don't serve blonds.''
She says ''How do you know I'm blond?''
The shop keeper says ''Because that's not a TV, that's a microwave."