When we combine different things (objects, ideas, inclinations) we begin an experiment in combinatory play. We actively engage in the realm of relationship. We play with the parts, combining them in different ways. And we get the direct perception that we are a part in a whole that is indeed greater than the sum of its parts. We are participating in what Walt Whitman called "the powerful play."
I have explored using the chair as a partner in every pose category and in just about every pose and variation I can imagine. The experiment, like all practice, is ongoing. There are many days when I don't use the chair at all in my practice. Because it isn't ultimately about the chair, or the prop, or me. It is about the process of engaging in relationship, being a part of the "powerful play" that Whitman alluded to.