Germany's latest AIDS-awareness commercial evokes some strong emotions: shock, disgust, nausea. And that's exactly the point. The controversial ad, which was released online on Sept. 3 and starts running on German TV on Wednesday, shows a couple having steamy sex in a dimly lit room with menacing music playing in the background. The viewer only sees the back of the man's head until the very end, when the camera pans to his face - to reveal that he's Adolf Hitler. Then the slogan flashes across the screen: "AIDS is a mass murderer."