Most human endeavors have been thoroughly studied, acknowledged, and appreciated . . . like the fact that every person born on planet earth is indebted to a mother and a father for the gift of life. After that, being the parent of human beings gets complicated, since humans are not bumble bees, daffodils or zebras, which have the appearance of looking like, learning like, and behaving like their fellow travelers, who 'belong' in the same batches.