Mädchen mit offenen Lippen

The name of this movie is Mädchen mit offenen Lippen released in 1972-06-23 and it's main theme is At the girls' school, the young teacher requests the young women to prepare a lecture on the topic The Preliminaries, for next week, before the year's end. The girls would contact him if they had any problems with their work. Thus a series of sexual experiments start, which will involve the whole class, and even the teacher..