A blonde walks in and says, "I want to buy that TV."
The seller says, "I don't sell to blondes."
The blonde comes back the next day with brown hair and says, "I want to buy that TV."
The seller says, "I don't sell to blondes."
The blonde comes back the next day with brown hair and says, "I want to buy that TV."
The seller says, "I don't sell to blondes."
The blonde asks, "That's it, how'd you know I was a blonde?"
The seller replies, "Because that's a microwave."