Geissel des Fleisches (1965 Austria) Torment of the Flesh

 A man who kills women because, as his lawyer says, he was not loved by his mother and in his puberty he was dismissed by girls as sexually unattractive; in short: it all broke the poor man's heart. And when ever he meets too inviting women now, showing their attractions, well, you see, it is the urge then, he just cannot control himself; it is, as the title says, the torment of the flesh.

Vegetarierinnen zur Fleischeslust gezwungen (2000 Germany)

 Vegetarierinnen zur Fleischeslust gezwungen (2000 Germany) 

Director: Andreas Bethmann (as A.M. Bertucci) 

A young girl is abducted by a psycho, who bizarrely speaks backwards to her, while forcing her to watch films he's made of his previous victims, all nubile but rather rough looking German chicks who he rapes in a decidedly XXX manner... and that's about it.

(IMDB Corpus_Vile)

Riot in Juvenile Prison (1959)

 Riot in Juvenile Prison (1959)

Directed by: Edward L. Cahn

 When the shootings of two juvenile inmates bring public 

protest, a psychologist is brought in to see if he can do 

anything to control the problems peacefully.

Feast of Flesh (1967 Argentina)

 Feast of Flesh (1967  Argentina)

aka

The Deadly Organ

Placer sangriento

Organ player wearing grotesque looking mask stalks young women, injects them with heroin, and then hypnotizes them with his organ playing and turns them into his love slaves, before stabbing them with a hypodermic needle the size of a turkey baster and leaving them on a nearby beach. (IMDB  Zbigniew_Krycsiwiki) S&NV