A general depletion of simultaneous or spatially contiguous orgasm in capitalist nations.
a) the near-total drop-off of visits to porn theaters, where strangers came together to come together, even if sometimes looking very straight ahead and not acknowledging their fellow watchers, or even to shops with viewing booths separated by walls but right next to one another, in favor of the atomized viewing of internet porn as a solitary activity and the cold light of the computer in a sleeping house, and
b) the non-take off of an orgiastic future - with all its relaxed codes of partnership, "fluid" sexuality, general upsurge in non-domestic sex as political and casual act - promised by parts of the sexual revolution, or even a general dilation of family values and all that comes with it,
it follows that now, 40 years after the start of the '70s, fewer people orgasm in reach, sight, or hearing range of one another. As for what, how, and who comes next, that's up for grabs.