Hentai never originated on Earth. Its origins actually took place in another dimension entirely. When the goddess Aeon Sophia descended into the Archontic Plane, she was completely nude. Upon witnessing this, the Archons became intensely aroused by her. Thus they lay upon their backs within the Khaos and ended up masturbating the entire physical world into existence. The manga/anime/hentai form is a close approximation/imitation of the perfect, immaculate beauty of the celestial devas. Which is why unattractive females rarely if ever at all appear within the manga/anime/hentai sphere. All of the females in that world are all meant to be as attractive as possible.
The nation of Japan was chosen by the Archons to be the official interdimensional ambassador for the purpose of importing the manga/anime/hentai form to the Earth Plane. The reasons for this were as follows.
- The Japanese were gonna end up becoming one of the foremost apex cultures on Earth.
- The concepts of art/aesthetics were incorporated into numerous aspects of their culture from its inception.
- Their culture values beauty/perfectionism. They possess a cultural trait of people always attempting to do their very best in whatever it is that they do.
- The sheer complexity of their language acted as a shield to Western minds. This helped to lower the probability of any Christian missionaries succeeding in Christianizing Japan. Which would've prevented hentai's inception. Case in point, Francis Xavier describing Japanese as the Devil's own tongue.
- Japanese women just so happen to possess the most erotic voices on Earth. Particularly, the mature/gentle sounding, low-toned variety showcased by the tomboy, ara ara mommy GF, puma/cougar, and MILF archetypes. Not so much the prepubescent, high-pitched, wailing banshee, oniichan type.