This movie was made in Europe somewhere,, the whole family is preoccupied with sex. The couple of scenes I remember involve a teenage girl. In one scene she is gathering objects on a bed to masturbate with, a mirror and a hairbrush. In the other scene she walks out of a room wearing a robe, she looks down the stairwell, takes off the robe and climbs the staircase naked. She slides down the banister naked while the narrator does the voice-over. Just found out I am related to one of the main characters in this movie,, would love to find it.