- Country: Spain
- Genres: Documentary, Drama
- Release:
- Director: Fernando Delgado
- Writers: Leopoldo Bejarano
- Language: None
- Stars: Juan Francés , Alfonso Orozco , Lorenzo Solá
- Runtime: 50 min
- Awards: N/A
- AKA: La terrible lección (Spain) , La terrible lección
- Plot: Supported by a simple story, this film is merely educative: gives advice against venereal diseases.
- IMDB:tt0018477