A number of fan fiction authors have speculated that there may be cultural implications to the fact that Lucius Malfoy wears his hair long1, while [Draco Malfoy] does not2. As best I can tell from a cursory search, there is no non-magical historical basis for an association between hair length and societal status in Europe.3 Thus if true, this would be something unique to the magical world, and more over, a uniqueness not substantiated by the cannonical works.
[Draco Malfoy]: </Harrypedia/people/Malfoy/Draco Lucius/>/ [DLM1]: </Harrypedia/people/Malfoy/Draco Lucius/>/