Food marketing has brought eating disorders upon us, and it is as likely that sex marketing will have the same consequences. There was a time within living memory when for most people, fast food and fast sex were both unattainable. The nation had much less food and much less sex than it has now, but it is very possible that it enjoyed both food and sex more than it does now. An orgasm prolonged for more than a few minutes would soon begin to pall. Routine sex is just that.
Sex is much more complicated than champagne, especially if two people or more are involved.
People don't often drink wine while reading about it, and less often find that they need to read about it before working up a desire for it, but people often have sex while watching other people having sex on video. Fast food is a way of neutralising hunger and hence the intrusion of images of food into other mental pursuits. Fast sex, too, might clear the decks for a different kind of action. The proliferation of pornography is rather like the rise and rise of the potato crisp, which now occupies both sides of a whole aisle in the local supermarket. The discussion of what we may and may not see in video and film has nothing to do with pornography, and everything to do with the ever retreating threshold of shockability.