I'm looking for the name of a movie from the 70/80s that starts with two young women, a blonde and a brunette, in their early 20s drinking and fooling around in the countryside who get picked up by a guy in his 40-50s driving an open top convertible.

After a minute, the blonde woman whispers something into his ear and he screeches the car to a halt. The camera then switches to the surrounding scenery from high above, and slowly zooms onto the car where the driver is now having sex with the blonde in the driver's seat, with the brunette in the back swigging from the bottle, hits him over the head with it, killing him, and they then steal his car. They later end up in a commune where they have sex with the men there. It was over an hour long, possibly Italian or Argentinian with the words 'one day' as a title in its native language.

The beginning is very similar looking to the first 10 minutes of 1972 The Hitchhikers.

Thanks in advance

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