I have a request /d/, but it's a bit of a complicated one. Usually, when I'm in need of a quick porn fix,or in a situation where I can't download, I go to a youtube porn site (youporn, redtube, etc) so I don't have to deal with downloading and all that. Unfortunately, good hentai is hard to find on these sites. So, for the sake of all lazy fappers out there, I humbly request that you wonderful pervs start uploading some of your best to these sites. Inyouchu, taimanin asagi, bible black, whatever else you think should be thrown in.
There's actually a few hentai centric "youporn" sites out there, but yeah they tend to blow.
/d/TV: All tentacles all holes all the time
http://hentaithat.com/Has full hentai videos. A few good ones, too.
Does redtube have some sort of non hentai rule? A search for hentai just gave me 4 "realistic" 3D videos.