We've witnessed the charms of Japanese erotica museums when they're entirely shuttered. It turns out they can be way more mind-warping when open.
Here are some choice scenes from the city of Beppu's hihōkan, which apparently closed (but you can still tour on YouTube for posterity's sake). During its sexy heyday, visitors could behold see-through wombs, pinnipeds mid-coitus, and an animatronic display of Snow White being pleasured by all seven dwarves while the Evil Queen peeps voyeuristically and Prince Charming watches on in horror. Said one visitor of this particular exhibit:
Yes, that's Grumpy on the right taking matters into his own hands, so to speak. Yes, the Queen has a dick for a nose. The worst part: when you hit a button on the outside of the exhibit, all of the characters would move. Dopey waved the underwear up and down, Grumpy flogged the dolphin, the others ducked around maneuvering for a good view of the action.
And just for kicks, here's a fine tableau from the still-kicking Atami Adult Museum. Photography isn't allowed inside this museum, but someone snuck out a video of the wacky erotic dollhouse and this photo of Bugs Bunny in a threesome with two Pink Panthers.