[eru]

Oh, there's more to it. Compare https://de.wikipedia.org/wiki/Hamburger_Sie

I can vouch for the Kassiererinnen-Du being used. My mom runs the butcher in a supermarket. She and and many of her coworkers share a lot about themselves, but they still address each as other as Frau Schmidt and Herr Schulze.

[cat199]

Apparently mincing one thing and putting it between a pari of two other things is a specialty of Hamburg, who knew!