A blonde goes to Best Buy and looks at the TVs. An employee comes over and asks if she needs help. The blonde replies, "Yes, I would like to you to show me what all these buttons do." The employee cringes at her dumbness, but he remembers that she is, after all, a blonde, and shows her the buttons.
He begins, "This is the volume button. It makes the sound louder or softer. This is the channels button. It changes the channels. And this is the power button. It turns the TV off or on..." The blonde interrupts, "But what if I'm trying to turn the TV off and it turns it on instead?"