The film was developed under the title
Stress. Producer
Carlo Ponti liked director
Umberto Lenzi's previous films like
Orgasmo. Lenzi's contract with Ponti was about to expire and he would lose money so Lenzi hastily devised a story which borrowed themes from
Orgasmo with some
road movie elements. Lenzi's story originally included references to drugs, an element which would have caused issues with the ratings board, which led to Ponti getting
Tonino Guerra who advised the director to change drugs with pornography. Ponti initially wanted
Carrol Baker to be in the film, as she had in previous thrillers from Lenzi, while Lenzi wanted American soprano
Anna Moffo. Moffo backed out on the film a few days before shooting and was replaced by Ponti with
Irene Papas who Lenzi felt was not appropriate for the role. Lenzi said he had trouble getting actress Irene Papas to participate in the threesome scene that takes place in the film. Papas wouldn't do nude scenes for the film, leading to re-organize some scenes and use a body double for some scenes. Lead actor Ray Lovelock sings a song called "How Can You Live Your Life?" over the opening titles, accompanied by a
sitar; a song that reoccurs throughout the film in different versions, supposedly with the purpose of trying to capture the "feel" of the
1960s hippie scene. ==Release and reception==