Relative reality

I do believe that the notion of what we perceive as experience and why it is shaped the way it is has many undefinable and unknown elements. That is to say that is beyond scientific research why do we all see love as love, abuse as abuse, neglect as neglect. How come we are evolved to see the sky the same way. How come the human body overall has the same internal structure as every other human but as external physical different attributes. I am aware of the evolutionary theory and understand this is thousands of years of evolution taking place, with the passing down of genetic codes down from generation to generation and that the environment one lives in some examples ( natural resources, weather, shelter etc. These three things were some of the original concerns of man and that changed over time in various directions but anyway. This is a different topic but not exactly, my friend once told me that once you trickle down everything, it all becomes one thing. The truth is reality is reality and various attributes of the universe, the earth, humanity, different societies within humanity, the technology shared or not shared, the common or uncommon practices of everything we and don't do, if we excluded individual perception exist within one reality. This will continue !!?