I saw a cool take yesterday, that we listen to music because it's a meaningful (it has patterns) adversarial example to our neural network. If we humans fit a good model of the world through exploration (I think the free energy principle says something like that? I don't totally get it), then we need to have incentives to find examples that counter our model, since that's the way we improve. Maybe art in general exploit something like that. Except some art is more simply explained because it just exploits things that help us/our genes survive (beautiful bodies, green sceneries).