It's a good one!

Psyched By The 4D Witch (1972) : Innocent little Cindy becomes possessed by the sex-crazed spirit of Abigail a Salem witch from the 17th century. Sh receives visions of her ancestor who was burnt at the stake 200 years before. From the fourth dimension, Abigail now promises to teach Cindy the secrets of sexual witchcraft. By uttering the phrase “Let’s fantasy fuck now,” Cindy can uses secrets of mental telepathy to seduce others, all, Abigail promises, without ever losing her virginity. But as Cindy starts exploring her sexuality, Abigail seduces her down a path to depravity. In the corruption of its virginal innocent, the film charts a clear progression that begins with masturbation and leads to loose sex followed by lesbianism, Satanic rituals, incest, necrophilia and then cannibalism. Amazing!