Often, you'll want to get some Parental Bonus or cool and hip comedy into your work to broaden your appeal to the Periphery Demographic. One common method of doing this in Science Fiction and Fantasy is by having a non-human character or a magical creature of some sort appear to be in tune with the cultural zeitgeist of the time period when the work was made, but not the one the work is actually set in, adding an extra touch of spice to the Anachronism Stew. Thus, space aliens will watch Casablanca, Gremlins will cosplay as Rambo, and, yes, the Genie will impersonate Jack Nicholson.