Thorn and Fink's relationship
I watched the movie 3 times and, to me, Thorn and Fink seemed like nothing more than two animals who know each other simply because they live on the same island, just like all animals know each other and without having a specific relationship or backstory together.
But then I noticed that people talk about them as if there was something... More between them before Roz appeared on the island.
Everything I know about Fink's backstory is that he had not the most loving mother. Everything I know about Thorn's backstory is... Well, nothing.
Then why is there so much talk about Fink and Thorn's relationship? And fanart suggesting that they knew each other well before? That they were enemies? Or even friends?
Maybe it's nothing important, but I'm really curious. You can tell me anything: What we learn about their relationship clearly from the film. What is subtly hinted at in the film. What we know to be true about their relationship, even if it is not shown in the film. And fan theories!