User:Hentai1

Outside of Japan, hentai (変態 or へんたい; About this soundlisten (help·info) English: /ˈhɛntaɪ/; lit. "pervert") is anime and manga pornography. In the Japanese language, however, "hentai" is not a genre of media but any type of perverse or bizarre sexual desire or act. For example, outside of Japan a work of animation depicting lesbian sex might be described as "yuri hentai", but in Japan it would just be described as "yuri". Alternatively you van watch gay man sexy time called "yaoi hentai", however im japan it would just be called "yaoi"

The word is short for hentai seiyoku (変態性欲), a perverse sexual desire. The original meaning of hentai in the Japanese language is a transformation or metamorphosis. The implication of perversion or paraphilia was derived from there. Both meanings can be distinguished in context easily.