Bleib sauber, Liebling! (1971)

Rosy Baumgartner comes from the very best of families, yet she has quite a bit of mischief up her sleeve. Her father is the eminent Senior Judge Gottwald Baumgartner, and her mother is a true woman of the world. Even so, the pretty young blonde has the coolheadedness of a ruthless master criminal: with a cheerful teenage smile and the help of her best friend Inge, the 17-year-old fleeces the male population in the most brazen way imaginable. If the mostly much older gentlemen want to spend an intimate hour with her, they had better pay handsomely. For a fee of 100 marks, Rosy gives her prospective clients a room key and the address, promising them the quickie they hope for. The men, eager to pay for hot sex with a neat little schoolgirl in a charming attic room, have no idea that Rosy has no intention whatsoever of showing up at the agreed time and place. One day, this comes to the attention of the titular gentleman from Bonn, an order-loving and diligent Undersecretary named Stubenrauch. But is this supposedly “good” husband really so opposed to having a little adventure and falling for Rosy’s charms? In the end, events gather pace, and most of those involved find themselves in police custody.