The problem is multi-layered. Anyone within the Anime Space will end up knowing it's a Hentai. But anyone in the more drama-TV/Streaming space has last seen the term from
the show of the same name. Which just so happens to have won a bunch of awards and be a hard R type show. If someone is connected to none of those spaces, I think it's also been used as the name of fictional drugs in a dozen different properties over the years, as well.
Should have called the gen "Acid Trip". Probably be more accurate anyway.