Director José Ramón Larraz later said of the film following its release, "No-one in that film could act. So what do you do with them? You put them in bed and have them jump on each other."
(at around 31 mins) The scene where a girl, played by Paola Matos, has sex with a goat during a ritual, was shot in the hall of 'La Cartuja', an emblematic religious building for agricultural activity built in the 17th century in Talamanca, Spain.
The films Spanish title, Los Ritos sexuales del diablo, translates to "The Sexual Rites of the Devil" in English.
The entire score for this film was gleaned from the Cam music library.