What's Black White and Gray All Over ?

What's black and white and gray all over? The black and white challenge for the week at the Daily Paintworks.
The task was to paint only black and or white objects.
I painted five all together but these three made the cut.
The first on the left is my final entry. I feel that it "fulfills the brief" as they say on the Great British Bake Off ( or as we like to call it the GBBO).

What I have learned so far:
Once again value was key. That is to say how dark or light something is as it relates to what is next to it.
I do not have black or gray in a tube so I mix them . I think it gives richer color, less flat overall.
This was a week of black and white thinking in my personal life too.
What I learned is that life is really lived in the gray areas. Not in the extremes.