Said Kurt Vonnegut in a 1973 interview with Playboy.
Playboy: You said it was sexual.
Vonnegut: It’s a tremendous space fuck, and there’s some kind of conspiracy to suppress that fact. That’s why all the stories about launches are so low-key. They never give a hint of what a visceral experience it is to watch a launch. How would the taxpayers feel if they found out they were buying orgasms for a few thousand freaks within a mile of the launch pad? And it’s an extremely satisfactory orgasm. I mean, you are shaking and you do take leave of your senses. And there’s something about the sound that comes shuddering across the water. I understand that there are certain frequencies with which you can make a person involuntarily shit with sound. So it does get you in the guts.
Playboy: How long does that last?
Vonnegut: Maybe a full minute. It was a night flight, so we were able to keep the thing in sight in a way that wouldn’t have been possible in the daytime. So the sound seemed longer. But who knows? It’s like describing an automobile accident; you can’t trust your memory. The light was tremendous and left afterimages in your eyes; we probably shouldn’t have looked at it.
Playboy: How did the people around you react?
Vonnegut: They were gaga. They were scrogging the universe. And they were sheepish and sort of smug afterward. You could see a message in their eyes, too: Nobody was to tell the outside world that NASA was running the goddamnedest massage parlor in history.