They also have odd phrases that jusy dont make sense to us.
A german friend of mine once said something about 'walking the red path' , which i think meant being grumpy or losing you temper and i'd never heard a UK phrase like that.
He also used to say 'dont over egg the cake' as in 'dont over do it' which again i'd never heard in the uk but that at least made more sense
Maybe the "red path" was a reference to the mood swings women have periodically?