Yes, Tatort is caught in the idea of educating the viewers. So when they search for the bad guy it will be a weapons dealer, a nazi, a capitalist or the like. The nudity was to force tolerance, such as to show gay sex scenes short time ago. Also using Miss Kinski which looks much older than she is, actually was a try to force tolerance of something not wished by the majority but standard of some wicked politicians. That episode included a love-relationship with teacher and the schoolgirl Kinski. Yes a French politician comes in mind. As long-time teacher I just can say that you simply can not fell in love with a scholar, due to situational awareness, as I say. Hard to understand for outsiders, I know.