I think that Terry's dire opinion is true--when porn is constitues the entire sexual education of men. I had this problem with my ex-husband. He was very confused that real sex has little in common with porn. In fact, he refused to believe it. Must be something we were doing wrong and not that the porn he watched was for entertainment, not an instructional video.
If people are given a proper education about sex and anatomy, porn can be a fine hobby. I, for one, am female and enjoy certain kinds of porn.