What I love about anime and manga is that you just can't make this shit up. You can certainly try, but the fact of the matter is that the otaku subculture will inevitably turn out something far stranger than your mere imagination could ever produce. I just got shot a link to this lovely work, for example. It's called Onani (Masturbation) Master Kurosawa. I am not making it up. It is a real and technically non-pornographic comic that the expert team of Ise Katsura and YOKO likely poured all their bodily fluids into.
This is the story of a high school student whose solitary joy in life is to masturbate in the girls' bathroom every day after school while fantasizing about degrading sex with the girls he goes to class with. (He'll trample them with his imagination!) In other words, he's a total loser. What makes this hysterical-- as opposed to simply the sad life lived by high school creeps all over the world-- is the over-the-top presentation. Even though only the otaku talk to him, this kid is presented as the world's coolest guy. We see everything through the hero's delusion-goggles: an act which is, in reality, sad and depressing is played as a cunning, devious accomplishment. I dare you not to laugh at it his smug, fulfilled smirking! From the way he's drawn, and the expressions he's given, one can only compare him to Death Note antihero Light Yagami. If, of course, Light was a serial masturbator.
And what more can I say about this oddity than that? If you want to read the first translated chapter, here it is. And again, while this isn't outright pornographic, I wouldn't exactly go reading it at work or anything. Don't blame me if it gets you fired.