I believe Harry Frankfurt had some useful observations that are very much to the point, and which echo and amplify the unintentional hilarity induced by the use of the phrase "no brainer" above.
I think you will find excrement goes through and is the result of very sophisticated and meticulous process. Internal power, the blood system, the organs, the functions nutritionslly, etc.etc. All fascinating stuff. If only humans could be in such harmonious alignment.