I remember watching this movie 1970 ish, not English some other language. It started out with two girls in the bushes making out and then the teacher sneaking up on them watching them make out and touch each other, then decides to let them be and go inside the school. After everyone is in the classroom the teacher wearing a dress with glasses starts teaching about the female and male anatomy. For demonstration the teacher shows the students he only vagina.

Towards the middle of the movie theres and man/bread man who the girls/students find attractive, one of them have sex with him. later on the 2 of the female students knocked him out and take a picture of hims penis. Later he goes to the school to tell the teacher what happened and instead the teacher use him so demonstrate the male anatomy.

Towards the end all the girls/students start having sex with each other.

Thats all i remember from the movie but I don’t know the name. If you have any idea of the name please let me know.