I think we've strayed from the author's central argument that "sexy" anime is now mainstream and acceptable and that more and more people are interested in it. As with any activity, if enough sickos participate, it somehow means it's socially acceptable, or should be. He's saying that lewd and sexually suggestive anime are ok to watch now without fear of being called a sexual deviant or pervert.

He's wrong of course, and trying to justify his own collection of hentai. He mentions how otaku prefer to idolize figurines with short skirts because they don't "talk back" like real women might. This article is pretty twisted.