Our most fundamental drives: breathing, hunger and sexuality, are our expressions of these foundational qualities. As life emerged in the dimension of time before extending into the spatial dimensions, these drives have an immediacy and presence that more complex cognitive / intentional processes do not.
Breathing is used in meditation to quiet the mind and connect one more fully with the present moment (exhale is the part of breathing most directly linked to this archetypal layer). Life at this level has a cyclical character.
If we examine the qualities of hunger and sexuality, one finds these drives express quite differently from our other human needs.