LOL.
Yeah, like *population* is a huge problem in Japan. Aging, maybe, but sheesh. If porn is limiting Japan's population growth, then boy, have we ever got a solution for China. (What's worse, porn or abortion? Bwahahaha--yeah, AS IF porn really gets censored in China, right. Certainly not the 'porn' some here are so up in arms about.)
If adults can consent to sex, then they can consent to being photographed in the act*. If children cannot consent to sex (and I fully agree they cannot), then they should also not be photographed or SEE photos of sex--and I'm 100% on board with that. But just because people can find a way, through technology or other means, to get around such prohibitions, doesn't mean you can take away the extremely simple adult consents I just outlined. Sure, you can come up with special cases all day long, when various acts get more extreme or when 'consent' gets blurred, but that doesn't negate the basic situation. Analogies to drugs, guns, etc are specious.
*You may disagree with my premise, but in this day and age, it's utterly impossible, except in a police state, to regulate how people use cameras, video equipment, etc., in the privacy of their own homes, and even harder policing who they share such information with. But the practical difficulties in banning or even restraining porn don't seem to matter to it's diehard opponents. Nor the unintended consequences: if porn were as hard to come by in the US as it is in, say, Saudi Arabia, TONS of people would see a significant money-making opportunity. Hmmm, just like, ummm, prohibition? And then how bad would illegal porn and all its offshoot social problems become? But nevermind, it's all about brain damage.
Right.
Here, you've touched upon an underlying reason why the Big Government "Conservatives" are antsy. They sense on some level the uncomfortable similarities between themselves and the current enemy of civilization, and fear that they will end up banished from polite society in much the same way genteel anti-Semitism was banished from polite society in the wake of the war to destroy Naziism.