Man... i mean, at some point, you might as well just do hentai. but then the author wouldn't have that distinction and uniqueness. I guess that's why he has a following at all, by taking common hentai themes, getting rid of all the actual tangible gunk and placing it in a more viewer-friendly environment? setting? basically, just normal manga. My theory is that it's because his art isn't that great, so it suits the crude nature of this manga, relative to mangas. But for hentais mangas/doujins? The art wouldn't cut it.