The Wonder of the Tundra

The Ethnography Collection at the State Museum in Copenhagen contains the world's largest collection of Inuit North Danish fur panties in public ownership (not excluding the possibility of a larger collection in private hands). This is all due to Knud Rasmussen. From 1916 to 1924, in the course of the 2nd, 3rd, 4th and 5th Thule Expeditions, he and his hand-picked team of ethnologists took their dog teams across Greenland and Eastern Arctic Canada, from one small transient Inuit settlement to the next. They would record each tribe's folklore, describe the material technology, watch the local shaman and try to work out his conjuring tricks, and then they would buy out the entire stock of the tribal sex shop.

"What is that interesting walrus-ivory carving under the counter? Yes, we'll buy that too. Do you have change for a dried haddock?"
After one of these visits the Inuit would be all "It's been a long day" (or night as the case may be) and "Let's just cuddle tonight and watch the Aurora Borealis" for the next six months until the shop could be restocked, and the shaman would be surprised by the sudden popularity of his grown-ups-only re-enactments of the creation and fertility myth.

Substance McGravitas goes on about his Biodiversity Museum but it has nothing on the Rasmussen Collection.

UPDATE: As mikey points out in comments, there is a missed opportunity here for Museum merchandising.

I forgot to mention the Novelty Condom cabinet:
UPDATE²: Inuit inflatable sex toys buoyancy aids tended to be functional rather than aesthetic.