I Think We Know What Type of Girls This Doctor Likes
ORRRR it could be the residual aftermath of the Aryan purification of Germany and most of Europe.. The war was only 67 years ago, that's not even enough to rebuild a generation, there are millions of people still alive from that war. So I'm sure if you went anywhere in central Europe and spat in any direction in a heavily populated area, chances are you've spat on a blonde person.
So in retrospect, the kind of women this doctor likes; are women.
There are very few countries where blonde people are close to half the population or more, mostly just Scandinavia and the Baltic states. Germany actually does not have a particularly high %. http://strangemaps.files.wordpress.com/2007/12/blond_hair_map1.jpg