

I mean, why? What is the unprecedented threat?
And I think you have a misunderstanding of how isolated teenagers were from sexual content before the internet, magazines weren’t exactly hard to get. Even before then, we’ve literally been making porn in every form of media since we were painting on cave walls.
It’s really not. You just weren’t exposed to it and think it’s new. The only change is the quantity, not the depravity. Marquis de Sade, the origin of the word sadist produced a significant amount of incredibly depraved erotic works back in the 1700’s, and he was not unique.
To your second point, should their first exposure be to porn? Of course not, but developing, evolving and maturing is done by exploring, not by sitting in a cave and generating knowledge from scratch, even if you have an equally amateur friend. That’s how people get hurt because they have no idea what they’re doing. If they want to see what’s out there, let them. Trying to ban everyone from sexual content until 18 is a uniquely modern take.
Not to mention, we’re far too uncomfortable with the topic to have their first exposure be anything but porn, since sex ed is all drawings and awkward anatomy. And childbirth videos. Since I was a kid myself, all I’ve seen is moral panic that wants nothing more than to simply shut the blinds and pretend that there’s nothing there.