 What do Paul and Rupert have in common with their conception of alien life forms?
One can't be too cautious about the people one meets in Tangier. They're all weirdies of one kind or another. The Place de France is the town's hub. It marks the end of Boulevard Pasteur, the main drag of the westernized part of the city, and the beginning of Rue de la Liberté, which leads down to the Grand Socco and the medina. It's quite a town, Tangier. King-size sidewalk cafes occupy three of the strategic corners on the Place de France. The Cafe de Paris serves the best draft beer in town, gets all the better custom, and has three shoeshine boys attached to the establishment. You can sit of a sunny morning and read the Paris edition of the New York Herald Tribune while getting your shoes done up like mirrors for thirty Moroccan francs which comes to about five cents at current exchange. Tangier is possibly the most cosmopolitan city in the world. In native costume you'll see Berber and Rif, Arab and Blue Man, and occasionally a Senegalese from further south. In European dress you'll see Japs and Chinese, Hindus and Turks, Levantines and Filipinos, North Americans and South Americans, and, of course, even Europeans—from both sides of the Curtain. In Tangier you'll find some of the world's poorest and some of the richest. The poorest will try to sell you anything from a shoeshine to their not very lily-white bodies, and the richest will avoid your eyes, afraid you might try to sell them something. As a result of them the permanent population includes smugglers and black-marketeers, fugitives from justice and international con men, espionage and counter-espionage agents, homosexuals, nymphomaniacs, alcoholics, drug addicts, displaced persons, ex-royalty, and subversives of every flavor. Local law limits the activities of few of these. The tables were all crowded and since mine was a face he recognized, he assumed he was welcome to intrude. Paul said, "How are you, Rupert? Paul said, "What ever happened to those poxy flying saucers?" A French girl went by with a poodle so finely clipped as to look as though it'd been shaven. "You know, what everybody was seeing a few years ago. I didn't know Paul very well, but, for that matter, it's comparatively seldom you ever get to know anybody very well in Tangier. Largely, cards are played close to the chest. Tapas at the Cafe de Paris are apt to be potato salad, a few anchovies, olives, and possibly some cheese.
 Their tendency to observe humans without interacting with them
 The belief that Earth should be more receptive to foreign life forms  They make the effort to socialize and attend large gatherings but are actually introverted  They believe in a hierarchy of human life and that those at the lower end were better off not around  Their tendency to observe humans without interacting with them