Le Pied – litterally : The Foot. But, in French slang, « prendre son pied » (to take one’s own foot) is to have one’s kicks, especially but not only in a sexual way – is a movie by Pierre Unia, whose career is exclusively made of softcore and hardcore movies (sometimes under the alias Reine Pirau).
This is one of his very first movies and it’s something of a curiosity. Mostly a silly comedy with very respectable actors (Micheline Dax, for instance, was a well-known screen and stage actress and, at one point, co-hosted children programs on French TV), it includes a number of harcore sex scenes. No, the respectable actors do not participate in them, and they might not even have been aware that they were acting in a sex movie.