Dear Gilliian Clarity and insight (this will make sense when you finish reading). You exhibit a cultural habit that is probably instinctive but manifests regularly.
As a development of higher reason, Taijiquan is a distinct activity with a unique philosophy, which is indicative of an advanced rationality. This use of the human mind has developed a set of combat effective physical exercises that are designed to complement the anatomy and physiology of the human body. No movement exists within Taijiquan that has not evolved from the requirement of optimising the inner and outer physical structures of the body.