I saw this as "Secrétaires sans culotte" -- an imaginative title considering that it doesn't feature any secretaries within or without their undergarments. The movie's primary title, "Malicious Martine", fits the bill much better, of course. A pretty ingénue visits the big city under the tutelage of her uncle. To make sure that she flies straight he has her monitored by a swarthy private dick (a role that is incidentally quite well acted), who can't, however, save cheeky Martine from getting into all sorts of scrapes, including that inevitable staple of French porn -- getting bondaged in a castle dungeon in downtown Paris. It never ceases to amaze me how those indestructible French manage to whip up a castle dungeon completely out of nowhere each time.
Brigitte Lahaie only has a brief scene, but overall the sex is indubitably rather pleasing to the eye. Barbara Moose in the title role certainly has a killer body, looks and moves, but overall the movie is just a flimsy pastiche of more or less random sex scenes. Which is fine by me.