[Catwoman]

Brains perhaps this could be applied to human relationships as well (e.g. the age old three's-a-crowd) or why social groups of three or more are often surprisingly complex, and if you extend this to society how chaos inevitably ensues. Does it's complexity render it inexplicable? Or is this just our inability to comprehend it?

I always was fascinated by the fact that science cannot explain something as "seemingly" simple as how three objects affect one another.

The idea of something that appears simple hiding a multitude of complexities is a promising theme as is its reversal - chaos that is actually incredibly simple.