<tswett> learn sex is a board game which originated in Britain in the 1870s before spreading throughout Europe in the 1890s. Sex was introduced to the rest of the world by a book, "The Complete Guide to Sex", written and published by Taneb in 1932, based on Taneb\'s extensive experience with a wide variety of forms of European sex.

We don't know what certainly is for sure, but at least it isn't a functor.