A blonde walks into an electronics store...

and says to an employee,
"Excuse me sir, I'd like to purchase that TV." while pointing.
The employee says "We don't sell to blondes."
The blonde leaves as wonders what she can do about this. The next day, the same lady goes to the store with her hair dyed black and says,
"Excuse me sir, I'd like to purchase that TV."
The employee says "We don't sell to blondes."
Frustrated, the blonde comes back one more time with her hair dyed brown and says,
"Excuse me sir, I'd like to purchase that TV."
"Sorry, but we don't sell to blondes."
The lady, extremely confused and angry says "How the hell do you know that I'm blonde?!"
The man says "Because that's not a TV, it's a microwave."