I agree it's interesting but again. When we are looking at the best habitat for an animal, reproduction of it's natural habitat is the key. Ball's just don't hang out and socialize in the wild that I am aware of. This may be both balls have found the optimal spot in the cage, between the two identical sides. It may be any number of things but I don't think it proves out that this is best for the snake. I think it's a human idea that we project on the snake. We would be lonely. We would want someone there with us. We are herd animals, we come together. That isn't what happens with our balls, in their own original world however.