What is this french spoken film?

Hi, what is the name of a movie in which the only scene I know is like this:

A shy blond young woman is standing in a classroom and her blond male teacher is naked, standing up by the desk, I’m not sure if that’s her imagination. She said something like: “je… Je… Je ne suis pas[Word]” and he said “non.. vian ici” she was very shy and the movie looked a bit old like… 90s maybe. There’s a pic of the girl. 🙂