The wonderful thing about photography in this digital era is that you can engineer your own reality and practically render whatever your vision and your mind desires.
For centuries we been compelled to respect and build a relationship with fire and its properties. But enough about that. This is not a science lesson.
The meaning of the image is what is most important here.
As the subjects appeared to have a moment and are simultaneously connected by the very properties that fire has to offer, this picture in some ways manifests two similar categories within the subject of chemistry. The relationship and harmony between two people that have good chemistry using the very fire which in it self is the very definition of chemical bonding.