Light of Heart (German: Leichtes Blut) is a 1943 German comedy film directed by Carl Boese and starring Hans Nielsen, Carola Höhn, Werner Fuetterer and Hansi Wendler. It was shot at the Johannisthal Studios in Berlin. The film's sets were designed by the art directors Franz Koehn and Hans Kuhnert.
Professor Faber, an entomologist, is in love with Herta but is alarmed by the time she spends with the sculptor Karl. He is filled with jealousy when he mistakenly believes that a nude statuette produced by Karl is based on Herta as the model. Encouraged in his jealousy by his housekeeper Christine, he decides to take out his secretary Doris who is in fact in a relationship with Karl. Ultimately, the confusions are cleared up and Fabery and Herta become engaged.