"Another argument is often made by the irresponsible ones who breed us – that it is an act of "leaving a trace" – strange impulse! Let us immediately observe that from an ethological point of view this is akin to the attitude many mammals have to leave droppings on the ground to mark their path or territory. The dog urinating against a lamp post also leaves a trace, one however which, unlike the baby, benefits from the privilege of not having to endure the grueling stresses of life."