As a sixteen-year-old exchange student, Fritz recei-ved several letters from his English host mother, which Fritz's parents regarded as inappropriate and intrusive, leading to them immediately asking the host mother to abstain from further contact. Fritz, who regards the contact as a friendship, assesses the situation completely differently and, for decades, feels betrayed by his parents.50 years later, the letters fall into his hands again and he is forced to realise that the exchange of such letters could have been inappropriate, even in the 1970's.Using the means of a non-representative survey to include the evaluations of third parties, the author Krause tries to clarify the question of where exactly or even approximately "common sense" draws the line between inappropriateness and harmlessness.