Here's a website about an Englishman named Mil and his German girlfriend Margaret. The site is called Things My Girlfriend and I Have Argued About. Some examples:

The way one should cut a Kiwi Fruit in half (along its length or across the middle).

First Born's name (Jonathan). Then, when that was settled...

How to pronounce First Born's name.

Margret walked through the living room on Friday as I was watching 'Band Of Brothers'. Absently, she asked, 'Is this "Killing Private Ryan"?'