Germany is famous for it's passion for romantic love... or maybe not.
The paperwork related to marriage was not what we are used to today. Marriage was important for the state to produce racially pure new generation of national-socialistic citizens. Thus some interesting paperwork was involved.
The following documents related to Love & Marriage are available:
Permission to get married for a soldier (for SS and regular army)
Political background / conduct check for a spouse to be (among other applications)
And as a result of marriage, children come inevitably: