Filou only licks Siegmar's head because his hair is as short as a cat's fur. I am sure he thinks Siegmar is the Big Cat (that's what I think too)

Many people who tell about their cat of the day say something like ..is more like a dog.. follows me around etc.
I always knew this was no doggish behavior but the behavior of cats that really live with their humans -they are different than the farm cats in the time of our grand parents who were more living within their peer group.