Once puberty hormones kick in, teenagers are going to start figuring out that there’s something going on. We’re far better off educating them about the risks involved rather than letting them blindly experiment.
Pornography is probably the worst way to accomplish this goal, of course. Comprehensive sexual health education is vastly preferred. But pretending sex doesn’t exist is how you end up with pregnant kids.
In cultures where sex is more taboo, they have bigger problems with teen pregnancy and early marriage. In the US, as access to porn has increased teen pregnancy has plummeted.
Making sex shameful doesn't just magically make people not do it. Tell kids "be abstinent, mmkay" doesnt lower teen pregnancy - it increases it.