I think that in the 70s of the last century there was more freedom in art. Peeping, incest, group sex, and adolescent sexuality were not banned by states and corporations. Why it was possible then and has become prohibited now — I do not understand. If you understand something about this or can recommend a movie, write to me below.
Don't Deliver Us from Evil (1979)
https://www.imdb.com/title/tt0066040/
Two high school girls decided to serve Satanism. Serving Satanism is sex and crime, according to the director of the movie, аnd the girls.
Caligula (1979)
https://www.imdb.com/title/tt0080491/
The first pornography I saw while visiting my aunt's house. I watched this movie many times when I stayed at her house overnight. Sometimes she slept in the same room, and I prayed to God that she wouldn't wake up and see what I was doing. Once I analyzed the plot, and as I remember, I realized that all the main perversions are mentioned in the film: incest, necrophilia, kukold, sodomy, violence, oral sex, homosexuality and lesbianism, pissing etc. I don't remember now if there is foot fetish, bestiality and copro in this movie. We need to review it again. Thanks to Tinto Brass for my happy childhood :^)
The melting of the snow / La fonte des neiges (2009)
https://www.imdb.com/title/tt1354003/
Léo is dragged to a nudist camping resort by his mother. Like most boys at the age of 12 or 13, being nude in public holds little appeal for Léo, who protests by wearing extra layers. Until he meets a certain special girl, who captures his heart and releases his inhibitions.
From me: the French ruined my idea: "you can't make films like that now." I sit and cry. Funny movie for 30 minutes.
Stepfather / Beau-pere (1981)
https://www.imdb.com/title/tt0082054/
After her mother dies, fourteen-year-old Marion falls in love with her stepfather.
From me: the guy will have a very hard time from her pressure. Very.
All films by David Hamilton
https://www.imdb.com/name/nm0357807/
And I found out about David Hamilton from photographs. Being in the Paris Library of Photography, I tried to look at albums with his photos, but I could not find them there. After returning from the trip, I think I understood why. Hamilton's work has been under investigation for two years. All negatives were removed. At the end of the investigation, he was fully acquitted. That's what my teacher told me.
Salò o le 120 giornate di Sodoma, 1975
https://www.imdb.com/title/tt0073650/
In World War II Italy, four fascist libertines round up nine adolescent boys and girls and subject them to 120 days of physical, mental, and sexual torture.
Schulmädchen-Report 1-13
https://www.imdb.com/title/tt0066341/
Mockumentary about German schoolgirls openly talking about their scandalous sexual experiences. Some of these are illustrated through inserted vignettes. Also, a street reporter asks actual common folk about their views on sex.
Maladolescenza, 1977
https://www.imdb.com/title/tt0076749/
A teen boy grows from playing and fighting with his German-shepherd dog to playing kid--then adult--games with two equally young girls in a dream-like forest which eventually turns eerie and somber.
The thousand and one perversions of Felicia / Les mille et une perversions de Felicia
https://www.imdb.com/title/tt0073390/
Paul and Gabrielle, a young married couple, take in their neighbor's teenage daughter, Felicia, for a few weeks in the summer. It isn't long before the precocious and seductive Felicia sets her sights on the two of them.
My Lover, My Son (1970)
https://www.imdb.com/title/tt0066113/
Francesca Anderson, the rich wife of an older millionaire, can't cope with the death of her lover, who is the father of her only son, James. As her son is somehow part of her dead lover, she falls in love with him and tries to seduce him, but he has a girlfriend named Julie. As her husband finds out all about this, he tries to kill her. From me: the movie is boring.