 What do Paul and Rupert have in common with their conception of alien life forms?
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. Paul said, "What ever happened to those poxy flying saucers?" "Well, hell, suppose for instance there's this big Galactic League of civilized planets. You're not eligible for membership until you, well, say until you've developed space flight.
 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