In my world science fiction and fantasy have always been linked together. Since the 1960s bookstores, both new and used had them in the same section. Most libraries today seem to lump them togeter as well.
Sometimes the distinction was almost clear as in Asimov's robotics, but where would you lump Harrison's Stainless Steel Rat series. Damn fine reading even today IMO, and I no longer read much SF and fantasy.
And Heinlein's Lazarus Long series was pretty erotic for that day and age for high school library material. I would classify it as wishful thinking
