A very long and detailed article titled "A Science-Based Case for Ending the Porn Epidemic" examines what pornography has done to our society, particularly since the rise of the Internet. It makes a strong case that pornography is a public health crisis, not just an issue of morality.
I've included a few brief excerpts from the article here, but it's far longer and more detailed than I can summarize in a blog article such as this. I urge you to click through and read the whole thing for yourself. I'm sure some of my readers will disagree with its conclusions; but for myself, having seen the effects of pornography on individuals in a prison environment and elsewhere, I find it convincing.
A scientific consensus is emerging that today’s porn is truly a public health menace: its new incarnation combines with some evolutionarily-designed features of our brain to make it uniquely addictive, on par with any drug you might name—and uniquely destructive. The evidence is in: porn is as addictive as smoking, or more, except that what smoking does to your lungs, porn does to your brain.
The damage is real, and it’s profound. The scientific evidence has mounted: certain evolutionarily-designed features of our neurobiology not only mean that today’s porn is profoundly addictive, but that this addiction—which, at this point, must include the majority of all males—has been rewiring our brains in ways that have had a profoundly damaging impact on our sexuality, our relationships, and our mental health.
Furthermore, I believe that it is also having a far-reaching impact on our social fabric as a whole—while it is impossible to demonstrate any cause-and-effect relationship scientifically beyond a reasonable doubt when it comes to broad social trends, I believe the evidence is still compelling or, at least, highly suggestive.
Indeed, it is so compelling that I now believe that online porn addiction is the number one public health challenge facing the West today.
. . .
Porn is a sexual stimulus, but it is not sex. Notoriously, heroin addicts eventually lose interest in sex: this is because their brains are rewired so that their sex reward system is reprogrammed to seek out heroin rather than sex. In the same way, as we consume more and more porn, which we must since it is addictive and we need more to get the same kick, our brain is rewired so that what triggers the reward system that is supposed to be linked to sex is no longer linked to sex—to a human in the flesh, to touching, to kissing, to caressing—but to porn.
Which is why we are witnessing a phenomenon which, as best as anyone can tell, is totally unprecedented in all of human history: an epidemic of chronic erectile dysfunction (ED) among men under 40. The evidence is earth-shattering: since the Kinsey report in the 1940s, studies have found roughly the same, stable rates of chronic ED: less than 1 percent among men younger than 30, less than 3 percent in men aged 30-45.
As of this writing, at least ten studies published since 2010 report a tremendous rise in ED. Rates of ED among men under 40 ranged from 14 percent to 37 percent, and rates of low libido from 16 percent to 37 percent. No variable related to youthful ED has meaningfully changed since then, except for one: the advent of on-demand video porn in 2006. It’s worth repeating: we went from less than 1 percent of erectile dysfunction in young men to 14 to 37 percent, an increase of several orders of magnitude.
. . .
The bottom line is this: given what we know porn does to the brain, and given that we know that the younger the brain the more plastic it is, it is a near certainty that whatever porn addiction does to adults, it’s going to do to minors—except much worse. This is something we must conclude simply from knowing about the basic facts of human neurobiology, even without taking into account any negative psychological effects of exposure of children to hardcore pornography.
There's much more at the link. Very worrying reading, but an important contribution, IMHO, to analyzing an important part of what's wrong with our society. It goes a long way towards explaining the "hook-up culture".