Body ritual among the Nacirema
I discovered this evening that Kam's parents, despite being dental professionals, had never encountered "Body Ritual Among the Nacirema," an article by Horace Miner originally published in 1956 in American Anthropologist. (Apparently a great deal of further scholarly work on the Nacirema has been published since then, though unfortunately many of those links are broken.)
The Miner article and Laura Bohannon's 1971 "Shakespeare in the Bush" should be required reading for anyone considering a career in anthropology.
If one enjoys those articles, one might also be interested in David Macaulay's Motel of the Mysteries.