No clue.
While wandering through a clothes store in a shopping mall, a blonde suddenly remembers she needs a microwave. Seeing one in the back, she tells the clerk she wants to buy it. The clerk looks up, and glances at the microwave in question and says, "We can't sell that to blondes."
Irate at the apparent discrimination she decides she'll fool him, and goes home and dyes her hair to become a brunette. The next day she returns to the same store and again asks a different clerk for the microwave. Again the clerk says, "We can't sell that to a blonde impersonating a brunette."
Aghast, she thinks it's unfair discrimination and decides to try one more time, only this time as a red-head. She waits patiently outside the store until another clerk is available and once more asks to buy the microwave. Again she is disappointed to hear, "We can't sell that to a blonde impersonating a red-head."
Frustrated she asks, "How did you know I was a blonde?"
"Because, that's not a microwave, it's a TV."
