Maybe it is a way of separating enough from these aspects of yourself so that you can take a look at them and 'experience' them without it being too threatening. It almost reminds me of a conscious way of disassociating various parts of your self while you need them separate. I also see it as a type of metaphor almost - not the same as describing things with 'like or as' but forming a picture to describe the experience better than words can. And you are creative so using your creativity in therapy is not really a surprise. You write parable-like stories, too, if I'm remembering correctly.