Karl-Günther Heimsoth

Karl-Günther Heimsoth, also known as Karl-Guenter Heimsoth (4 December 1899, Charlottenburg – July 1934, Berlin) was a German physician, polygraph, and politician. Heimsoth was a member of the Nazi Party.

Karl-Günther Heimsoth was born in Charlottenburg, the son of a court clerk and bank director. His youth was spent in Dortmund, where in June 1917 he passed his abitur, a test of maturity which was simplified temporarily because of the First World War. He then enlisted in the Prussian Army and until the end of 1918 participated in World War I, being deployed on the Western Front - finishing with the rank of lieutenant.

In the summer semester of 1919, Heimsoth began studying medicine at the University of Tübingen. Heimsoth continued his clinical training at the Universities of Munich, Kiel and . At Rostock he passed his state examination to practice medicine in the spring of 1924. During his studies, in 1920 and 1921 he participated in the Ruhr Uprising, the fights in Thuringia, and the Silesian Uprisings as a member of the Freikorps.

Between August and November 1924 Heimsoth wrote at Rostock his dissertation entitled Hetero- und Homophilie ("Heterophile and Homophile"), which was devoted to homosexuality. With this work, Heimsoth was probably the first to introduce the term "homophilia" in sexology.

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