One point to remember: in the past the teenagers were not only "walking hormones" but they had full time jobs and married a lot earlier than they do now. I'm cool with the suggestion that teenagers be treated as "grown ups in training", as long as we're talking about at least most of the "training" time being dedicated to taking care of responsibilities, not porn and video games.
For example: My grandfather married and was getting it on at a lot earlier than I did ... but he also worked full time at the steel plant at the same age that I started my first job working part time at a grocery store (not counting earlier money I made cutting my elder neighbors' yards). He was man enough to make ends meet at an earlier age than I was, and by extension, one could argue, mature enough to have sex at an earlier age.
But in the modern world it's the opposite. It's expected for kids to be sexual long before they learn to be responsible. I'm not ready to agree to that.
I am over 18 I swear I am..