Two ways to fill a bath
You can fine tune the warmth mix to fit exactly to your taste. It involves the very exact measure, is boring and does not account to changes (water temperature in tap and in bath changes throughout filling). But You can put an approximate mix, and when the water becomes too hot or cold change the temperature to the opposite direction.
This trick works for many things. Instead of fine tuning loneliness vs. Being with people, one may push to one direction, and when feeling fed up going extreme to the other direction for balance.
Filling that way has many advantages. It is more fun. You always have only one thing in your mind, the direction, whereas with fine-tuning, you need to hold constantly in mind both directions and the complex conditionals by which you should measure all the time.
Local ine sided direction allows you to u fully and intuitively the full current situationand conditions, whereas fine-tuning requires you to consider the LNG term strategy all the time (because you all the time work on the long term optimization formula)
So now I realized that I am underweight, I am single-mindedly aiming to eat. Two days pass, my stomach is tired, I single-mindedly to relax stomach (note tha earlier goals are not deleted, nor heavily factored in, just that I have something new now. Probably these older decisions are somehow there anyway and will showbup somehow)