Looking at the title, and the names of some of the protagonists (Rosl Mayr, Josef Moosholzer, Uschi Stiegelmaier) this appears to be one of those Bavarian sex comedies made by the lorry-load during the early to mid 1970s. In some sense this characterisation is accurate, because it is a sex comedy and it also is Bavarian.
The first clue that we might get something very different here is the name of the director: Ulli Lommel, more at home at more serious genres, although he tried his hands at other pieces of exploitation cinema as well.
The film looks very different and sounds very different from other Bavarian sex comedies. The sound was not redubbed afterwards, it is original sound. The dialogue also appears more real and less scripted, probably largely improvised. The cinematography also fits that impression, the scenes appear less staged and more taken out of life. The content completely lacks any of the cliches of the genre, e.g. there is no camp homosexual, no "fensterln", no horny Gastarbeiter, no voyeur watching people bathing in a lake and stealing their clothes.
That does not make it a better film though. There are good reasons why genre pictures have their cliches, and if you take them out you have to find an appropriate replacement. I do not think Lommel managed that, the film remains an experimental oddity.
