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exotic (adj.)[exotic 词源字典]: 1590s, "belonging to another country," from Middle French exotique (16c.) and directly from Latin exoticus, from Greek exotikos "foreign," literally "from the outside," from exo "outside" (see exo-). Sense of "unusual, strange" in English first recorded 1620s, from notion of "alien, outlandish." In reference to strip-teasers and dancing girls, it is attested by 1942, American English.
Exotic dancer in the nightclub trade means a girl who goes through a few motions while wearing as few clothes as the cops will allow in the city where she is working ... ["Life," May 5, 1947]
As a noun from 1640s, "anything of foreign origin," originally plants.[exotic etymology, exotic origin, 英语词源]
Prince Albert: "piercing that consists of a ring which goes through the urethra and out behind the glans," mid-20c., supposedly so-called from the modern legend that Albert of Saxe-Coburg-Gotha (1819-1861), prince consort of Queen Victoria, had one.

But the term seems to be not older than bodyart maven Doug Malloy and his circle, and the stories about the prince may be fantastical inventions. Perhaps there is some connection with Albert underworld/pawnshop slang for "gold watch chain" (1861), which probably is from the common portraits of the prince in which he is shown with a conspicuous gold watch chain. Many fashions in male dress made popular by him bore his name late 19c.