Short-short story, American author, read in the `1960s, probably in an anthology but might have been a magazine. A pair of gullible aliens are on their first trip to Earth. A (seemingly) friendly human takes them under his wing and shows them the sights. They are very happy, unaware, at the end, that the Earthman is leading them toward a cage.
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This story is The Underprivileged (1963) by Brian Aldiss. Three alien refugees from a war-torn planet land on a human-colonized world, are given the grand tour & see how wonderful things are. Congratulating themselves on being given permission to settle there, they " - turned and hurried into the big scarlet-painted cage."