To be fair, you have to have a very high IQ to understand Hentai. The romance is extremely subtle, and without a solid grasp of tentacle physics most of the "action" will go over a typical viewer's head. There's also the nuanced idea of feminimity, which is deftly woven into the visuals - the japanese philosophy of censorship really puts emphasis on imagination. The fans understand this stuff; they have the intellectual capacity to truly appreciate the depths of these ideas, to realize that they're not just erotic - they say something deep about human sexuality. As a consequence people who dislike Hentai truly ARE idiots- of course they wouldn't appreciate, for instance, the eye opening nature of watching Yaoi as a straight male, which only a true intellectual could appreciate without any form of arousal.