Porcupines huddling for warmth keep stabbing each other — that's intimacy
Schopenhauer imagined a group of porcupines on a cold night, driven together for warmth, only to prick each other with their quills and scatter — then drift back together as the cold returns. He used it as a parable for human relationships: we need closeness, but closeness has a cost, so we settle on a bearable middle distance.