I just remembered something about the Archie comics I used to read. They were always kissing, and even though I knew how babies were made, and about sex, it never occurred to me that teenagers did it, I don't think. I certainly didn't think about Archie and the Gang doing it. There was this one Archie comic, though, which is the point of this post, where Betty and Archie were kissing heavily, and then the door rings, and it's Jughead, and they get all embarrassed and say it's great that he showed up when he did. And then either Archie or Betty added, "...I think!" I just thought they were embarrassed to get caught kissing, but I'm pretty sure now it was that they were going to do more. It just never occurred to me. The comics were never sexual, but I think that's what they were talking about in that one.
It's weird how informed I was, yet how innocent I was at the same time.