This is actually not as bad as you might think. It was originally meant to be directed by Michael Findlay, who churned up a lot of oddities in the 60s, but he settled for doing the voice-over of the shrink and left the entire production to his wife Roberta (who shot the 1976 film Snuff).
The film begins with Viveca Hansen in her shrinks office. She recounts to him how her stepfather, called Hans, raped her when she was 14 after her mother died. "I could see in him a lustful passion. He wanted my body. He'd always wanted it!"
"And you had no wish to give up your virginity?" The shrink presses.
"No not to him. But nobody was around for miles. He threw me down and it was all over. I knew he was going to rape me."
Then the shrink asks a question he will continue to ask throughout the film:
"Did you have or feel any sexual excitement with him?"
Anyway, the rape causes Viveca to leave her native Scandinavia (we're not given an actual country) and come to this country where she hopes to meet "a nice young man." Turns out that nice young man is Don aka Harry Reems from Deep Throat. By the way, you should watch how they meet because this is the most contrived set-up in the entire history of film-making.
From that point on the two fall in love- which means they boink at a lake and in the shower.
The next day Don cheats on Viveca with another girl called Marie. She catches them having sex on the living room floor, then Marie urges Viveca to join in (some very good voice-over here). Soon Viveca realizes shes a dyke, so the next two scenes are really Viveca fscking Marie, whilst Don has sex with a bellydancer (Arlana Blue). Afterwards, the shrink is so turned on he has to boink Viveca.
One thing that really stood out in this flick (apart from the girls who actually aren't so bad) was the waa waa fender rhodes and fuzz guitar soundtrack, plus the awesome Arabic music during the bellydancing sequence. Apart from that, it's pretty straight-forward early 70s sex with a very high beaver count and Erotica Lantern is almost every scene looking (amazingly) pretty strokeworthy.
Alter of Lust ? APPROVED!
edit note: fixed title for loop