It's like having two best friends, but they're actually the same friend.
You know, like, imagine you're in a bar with your BFFs, and you order two identical drinks, and they're somehow connected in a way that lets them taste the same thing at the same time.
But then, like, one of them starts wearing a fedora and the other one starts wearing a trench coat, and you're all, "Wait, what the heck is going on here?"