This is to the person asking about funny hentai earlier. A great hentai that's really hilarious is Newmanoid Cam. It's hilarious, I've saved a few pictures onto my computer because I thought it was funny. I don't have any pictures, but it's worth a google search if anything. Best of luck to them!! ^U^
All the suggestions I have are guro manga, but if you don’t mind that, then I suggest you look up stuff by Shintaro Kago. About 90% of his stuff is funny. I’ll be honest, I’m not sure if any of it could be considered sexy even if there are a lot of naked people and sex; I always just see it as lolarious.
If you want to scour some of your favorite series’ hentai, you can go to Fakku and lurk around there, though?