What possible advantage can anyone have from destroying the life of this man like this?
"God" will like them more. Pleasure is evil, sex is even more evil, and sex involving people who look like they're under 18 is so evil that you shouldn't even be allowed to think about it.
Not to mention that it establishes a precedent. Your library, your viewing habits, your browser history are all potentially criminal now. Can you declare with certainty that you possess nothing incriminating?
What if the definition of obscene materials were expanded to include depictions of abortion or of darwinism...?
"God" will like them more. Pleasure is evil, sex is even more evil, and sex involving people who look like they're under 18 is so evil that you shouldn't even be allowed to think about it.