'Well, if we hadn't had the Wright brothers, there would still be airplanes. If there hadn't been an Edison, there would still be electric lights. And if there hadn't been a Hefner, we'd still have sex. But maybe we wouldn't be enjoying it as much. So the world would be a little poorer. Come to think of it, so would some of my relatives.' —Hefner in a Playboy interview in 1974. (AP)