Primistry
Many kinksters will argue that BDSM is about physics- the creamy rhythm between the cane and the flesh, or the quiet intensity of tying a submissive in a challenging and artistic position. Others might counter by saying that is all about biology- kink electrifying the exchange of endorphins and fuelling the intensity of the pain and pleasure paradigm.
Two episodes with my Mistress recently illustrated to me that whilst both above are true, its chemistry that is the all-important science, needed to create the perfect scene between Dominant sadist and compliant submissive.