It sounds like you are referring to the famous 1991 Belgian educational film series “Sexuele Voorlichting” (Sexual Education), which was produced by the Bevoegde Instantie (Competent Authority) for Flemish schools. While the original 1991 film was in Dutch, an English-dubbed or subtitled version (titled “Sexual Education for Boys and Girls”) became widely circulated years later, particularly on educational video platforms and, later, the internet.
The original film runs approximately 45–60 minutes. It is divided into clear chapters. Based on archives and VHS rips, here is the explicit curriculum: It sounds like you are referring to the
Original Title: Sexuele voorlichting (translated as Sexual Education). Physical Changes: The narrator discusses the growth of