This is a composite film. Most of it is made up of a cut down version of Introductions (1976).
Then comes a segment featuring three girls in a pool (Marie-France, Jessica Stehl and Katya Strambi) and André Kay. Then there is a cut to the same performers, joined by Eric Saville, on a large yacht. This is from Prouesses anales pour top modèles de luxe and was shot in Israel.
The third and final segment is a different edit of a scene included in Extases anales featuring Marilyn Jess, Melissa Bonsardo, Valérie Sidy and Sonya Lendl on a lawn with André Kay, Gabriel Pontello and the uncredited Pascal Pouschat.
Thanks to skin flick for some extra information and IDs.
Film information updated with help from Dictionnaire des films français pornographiques et érotiques 16 et 35 mm.