Hentai Knowledge (Source: Urban Dictionary)
Hentai can involve anything sexual. Lesbians, bisexuals, homosexuals, bondage, underwater, fairies, humans and animals, orgies, oral sex, aural sex, anal sex,
naisal sex, S&M, slavery, dildos, strap-ons, anal toys and of course heterosexual vaginal sex. Hentai isn't always sexual penetration with a group or pair of people.
It can be a woman/man/tranny posing or masturbating. It could be a group kissing or
undressing or fondling each other. Hentai has no limits. That is why it is so great.
I have nothing against real pornography, I enjoy it also. But hentai is perfect.
Normal pornography is not. Hentai is beautiful.

Explicitly sexual pictures, movies, comics, or even games drawn in the Japanese animation style. A common practice in hentai is to stretch the sex acts beyond the
boundries of normal human sex. Hentai is based off of a very old practice of drawing sexually explicit acts in order to aid the process of masturbation and has, actually, a richer history than pornography.

Hentai has a negative connotation to the Japanese and is commonly used to mean "sexually perverted".
In slang, it is an insult meaning pervert or weirdo and isn't applied to pornography in Japan.
18-kin, adult manga, and AV are used to indicate pornography. Hentai anime/manga is focused on sex, the 'yummy parts,'
as some may say. It's heterosexual sex, and your homosexual sex is yaoi/yuri.