Nude for Satan (1974)
A solid candidate for the most bizarre 1970s Italian horror movie I've ever seen (and anyone who's seen a number of 1970s Italian horror movies will know that's not a claim to make lightly!).
Whilst driving through the countryside in the dead of night during a thunderstorm, Dr William Benson (Stelio Candelli - Planet of the Vampires) almost hits a female figure that suddenly appears in the road in front of him. He stops and gets out of his car but the woman is gone. As he gets back to his vehicle he hears the sound of a car accident. He turns and sees a car now crashed into a tree with a young woman ('Susan', played by Rita Calderoni - Delirium) unconscious at the wheel. Being a good doctor he leaves her there and wanders off.
Finding an ominous-looking castle he pounds on the door. He gets no reply, but as he turns to leave, the heavy door creaks open on its own and he goes inside. He soon encounters a woman who is the exact double of Susan - although this woman's clothes and hair are in the style of about a hundred years ago. She calls him 'Peter' and can't understand why he insists that isn't his name. Meanwhile, Susan has recovered and makes her own way to the castle, where she encounters a man who is the double of Dr Benson - except that he's also dressed in the manner of long ago, and whereas Dr Benson is dashing and handsome, this man is seedy and suggestive. We then encounter a female servant who just appears and seduces Susan (which Susan never seems to question), a grotesque manservant who whips this female servant to within an inch of her life, and some non-sensical, pseudo-philosophical/mystical spouting from a guy dressed in a suit and opera cape (complete with blood red lining) who may be Satan - or he could be a vampire (there are two young women who turn up later who sleep in stone coffins). All this leads to a weird foot chase, a cringe-inducing orgy-like ritual, and the worst looking imitation giant spider you will have ever seen. And I've still left a ton of stuff out.
Honestly, trying to make sense of it is a non-starter. But it delivers on the promised nudity, with the gorgeous Calderoni and the other women spending as much time naked as they do dressed; whilst Candeli - at times looking uncannily like a blonde Jack Palance - does a very nice job of playing two such different versions of himself.
As I say, it's a bizarre film. But it's atmospheric, the women are beautiful, and it's well shot and lit. 5/10