Rote Sonne aka Red Sun by Rudolf Thome (West Germany / 1970)
A film about 4 women living together who kill every lover they have after 5 days. When an ex-boyfriend of one of the girls arrives, things get complicated.
The whole movie is an interesting metaphor on male/female relations nowadays (or the ones of the 1970s in west germany ), with much symbolism.
Interesting, but I didn't "get" it all.
*** / ****