You should really know

I am reading  about the Deming cycle and his theories on quality control for a business. His rule is the famous PDCA, which stands for Plan, Do, Check, Act. Very interesting not only for a business, I would say, but for every-day life as well. At the same time while reading this, the radio is playing this popular song by Imany, called "You will never know" that I have seen posted on Facebook by numerous friends of mine. It goes something like

"You will never know,
   I will never show,
   what I feel ,
   what I need from you.."

Many people (me included) have sung out loudly and posted this song feeling that it expresses exactly how we feel for this special someone we have in our hearts and minds. And I was now wondering, why? 

Why never show? Why never know? Why is it not our current practice to show what we need and want from this special someone, why keep it secret if he is really worth it? I think it is about time we adopt the Deming cycle in our personal decisions and act accordingly, instead of never show, never know...!