In olden days a glimpse of stocking was thought to be shocking. May have been porn to that era. Then there were the cultures where women were topless wasn't porn to them. When I was a kid kissing scenes on tv were very embarassing now its men kissing.
Well, that's perfectly true. The culmination --- you can see it from here --- is that porn will be working every oriface, creaming every surface, fully mainstreamed, mass-produced and virtually unavoidable--- and men will barely be interested enough to touch real women anymore. Or look them in the eye.