The Love Keys
Bleib sauber, Liebling (original)
The 17-year-old student Rosy (Heidi Hansen) wants to improve her pocket money: For a pledge of at least a hundred marks, she hands over a key to older men and allegedly her address. Lots of love-goers fall in on the trick. - Fluent comedy.
Starring Horst Tappert, Heidi Hansen, Uwe Friedrichsen, Margot Trooger, Margot Hielscher, Siegfried Schürenberg, Jutta Speidel, Ethel Reschke, Inge Wolffberg, Horst Pinnow
Watch "The Love Keys" on Cultpix released in 1971. It's a comedy movie, and has a rating of 4.3 out of 10 from Imdb which is fairly low for this kind of movie.