https://youtu.be/mB9ycd7ojsA this hentai audio was popular on YouTube for awhile as a sort of gag meme, although the videos with this sound generally got deleted becuz sex. But according to the research I did 1 year ago this video is the earliest sighting of the sound on YouTube, because judging from the editing of the others prior to their deletion, I came to the conclusion that they were clipped from this specific YouTube video, and not the original hentai. Also I asked the maker of this 3 hour version and he said he got it from a sketchy porn site, and can't remember. Now initially that probably sounds like a lie, but I believe him. So that means the original is a hentai video not just audio, and it's somewhere on a random hentai site. As of right now each one of u is now an official temporary member of the investigative team known as the anime task force