Okay . . . that makes sense . . . English textbook from Japan circa the 1980s . . . when I first came to Taiwan back in 1989, I went out with a girl who had a small handbook with similar phrases although her text was a bit strange in that the English was very sexual while the Chinese explanations were very vanilla so “Do you want to shack up?” was translated as something along the lines of “Do you need a place to stay?” There was an old Monty Python sketch about a phrasebook that had really obscene statements being taught to immigrants as common and polite expressions. I remember it being very funny. Little did I know when I first saw that bit that it is a reality.