Prague is a city rich with history, even the history of sex machines. The Sex Machine Museum is an exhibition of erotic appliances. This museum has more than 200 objects and mechanical appliances on view, a gallery of art with erotic themes, a cinema with old erotic films (which had everyone giggling their faces off), erotic clothing and many other things pertaining to human sexuality. I would have loved to see a gift shop there as well but they only had a few postcards. It’s titillating and informative. I highly recommend you add it to your Prague to do list.
http://www.sexmachinesmuseum.com/en_page.html