A blonde walks into an appliance store, she goes to the cashier and says, "I'd like to buy that television".
The cashier replies, "We don't sell to blondes".
Furious, the blonde storms out of the store.
The next day the blonde goes back to the store but with a black wig on. She goes to the same cashier and says, "I'd like to buy that television".
The cashier replies, "We don't sell to blondes".
Confused and angry the blonde says to him, "How do you know I'm blonde? I have a black wig on!"
The cashier replies, "Because that's a microwave, not a television".