KISS, is an actual principle developed by the U.S. Navy in 1960, which explains how I learned about the principle while serving in the Marine Corps for many years. It is a principle that is easy to remember and can be applied, not surprisingly, to many areas of our lives.
I am not sure where to go with this but I like the idea of a simple formula for complex problems and KISS is reminder to look for the simple solution.
I seem to remember on more than one occasion when KISS was used someone was tying to show how smart they were by adding more complexity, I think the opposite is often true.
If you are so smart then you should be able to keep it simple for us less smart folks.
Image retrieved from here: KISS