Titles

Germans are a anomalous among the peoples of Europe in that they can concatenate titles.  When addressing a letter to a man who has a doctorate and is also a full professor, the Germans write "Sehr geehrter Herr Prof. Dr. ____."  "Very respected Mr. Prof. Dr. ____."  This feels absurd to me, but this is how they do it.

The unexpected side effect of this is that, when referring to people with titles in conversation, it is always acceptable to say just "Herr ____" or "Frau ____."  In English, the Mr. or Mrs. is chased away by the Dr., but the Germans are not so exclusive about things.