There is a taboo when it comes to talking about sex, the conversation from traditional/ conservative people is sex negative; as such respectable people don't talk about. What is left is only thise who are not respectable but willing to actually have the conversation. Advertisers and pornographers use sex to sell, but their motives do not align with healthy atttudes towards sex. Advertisers put sex up on a pedestal, ab object of the greatest desire and social status. Pornograpers specifically cater to their audience's arousal.
We need sex positive conversations, in public. Healthy model behaviours for kids to learn from. If you believe that sex should only occur in a committed marriage, then show the advantages of that kind of relationship - you almost need to compete directly with porn.
Where holland has 'sleep overs' with teenage kids, so they can have sex with their parent's knowledge and support, you can see a healthy attitude towards sex. Something largely absent in other cultures. I can only conpare to alcohol, by merely prohibiting it, teens don't learn to use it responcibly. They learn with their peers who know no hetter. Parents should encourage responcible attitudes to drinking at home with their teens.
Trying to limit porn merely perpetuates the same sex negative attitudes which got us here in the first place. We need to normalize it, (as normal as talking about drinking or gambling) talk to your kids, talk to your friends.
Take it down off the pedestal and talk about reality.