Die Sextherapeutin 7. The successful finance and real estate agent Diether von Stein is looking for our busty sex expert, Dr. Lotterbett, because he only has problems with women. On the street, he picks up cheap hussies who quickly juice him up in dark alleys or hallways. His extremely fat but equally weak-character partner Martina cheats on him with his business partner Horst. He promises marriage to his busty, blonde, and sweet-smelling secretary, Sil...