Late one night on the cusp of the 20th century, Magnus Hirschfeld, a young doctor, found a soldier on the doorstep of his practice in Germany. Distraught and agitated, the man had come to confess himself an Urning—a word used to refer to homosexual men. It explained the cover of darkness; to speak of such things was dangerous business. The infamous “Paragraph 175” in the German criminal code made homosexuality illegal; a man so accused could be stripped of his ranks and titles and thrown in jail.