There’s a collective trauma associated with knee high socks. For most of us, they belong strictly to the realm of primary school assemblies, scuffed knees, and that relentless urge the moment you hit teenage hood to push them down or abandon them entirely for invisible ankle socks. Yet, as autumn rolls in and back to school nostalgia inevitably hits the fashion cycle, knee highs have officially re-entered the chat. Bella Hadid made a particularl…