Hoffman and Sons (1976)
aka Hoffmann und Sohne aka The Pleasure Shoppe
Starring: Claude Janna, Micky Love, Susan Rosebush, Candy Dallas, Angelique Duvier, Michele Grubert, Robert LeRay
Mr Hoffman sells books and provides his female customers with nice moments in a room at the back of the shop. The number of female customers grows very rapidly and when Mr Hoffman isn’t up th the demand, he calls in his two oldest sons who keep the shop going. Unfortunately his youngest son is only interested in reading. One day, as he delivers books to one of the customers, the lady teaches him about the pleasures of sex. In order to celebrate this, the father organises a party and all is well that ends well!