This might be of interest to #lgbtq folks curious about history of the sexes. Also of interest to #sexologists - but I suspect they might be aware of this material already.

https://publicdomainreview.org/essay/out-on-the-town
Out on the Town: Magnus Hirschfeld and Berlin’s Third Sex

Years before the Weimar Republic’s well-chronicled freedoms, the 1904 non-fiction study Berlin’s Third Sex depicted an astonishingly diverse subculture of sexual outlaws in the German capital. James J. Conway introduces a foundational text of queer identity that finds Magnus Hirschfeld — the “Einstein of Sex” — deploying both sentiment and science to move hearts and minds among a broad readership.

The Public Domain Review