Denial exists because human infants though equipped with trust-o-meters are built to trust blindly and absolutely any older person who wanders past.

Where does discontent start? You are warm enough but you shiver. You are fed yet hunger gnaws you. You have been loved but your yearning wanders in new fields. And to prod all these there's time the Bastard Time.

The juvenile sea squirt wanders through the sea searching for a suitable rock or hunk of coral to cling to and make its home for life. For this task it has a rudimentary nervous system. When it finds its spot and takes root it doesn't need its brain anymore so it eats it!