Stable and functional families sport far fewer children than abnormal or dysfunctional ones. Between one third and one half of all children are born in single parent or in other non-traditional, non-nuclear - typically poor and under-educated - households. In such families children are mostly born unwanted and unwelcome - the sad outcomes of accidents and mishaps, wrong fertility planning, lust gone awry and misguided turns of events.

The more sexually active people are and the less safe their desirous exploits - the more they are likely to end up with a bundle of joy (the American saccharine expression for a newborn). Many children are the results of sexual ignorance, bad timing, and a vigorous and undisciplined sexual drive among teenagers, the poor, and the less educated.

Still, there is no denying that most people want their kids and love them. They are attached to them and experience grief and bereavement when they die, depart, or are sick. Most parents find parenthood emotionally fulfilling, happiness-inducing, and highly satisfying. This pertains even to unplanned and initially unwanted new arrivals.

Could this be the missing link? Do fatherhood and motherhood revolve around self-gratification? Does it all boil down to the pleasure principle?

Childrearing may, indeed, be habit forming. Nine months of pregnancy and a host of social positive reinforcements and expectations condition the parents to do the job. Still, a living tot is nothing like the abstract concept. Babies cry, soil themselves and their environment, stink, and severely disrupt the lives of their parents. Nothing too enticing here.

One's spawns are a risky venture. So many things can and do go wrong. So few expectations, wishes, and dreams are realized. So much pain is inflicted on the parents. And then the child runs off and his procreators are left to face the "empty nest". The emotional "returns" on a child are rarely commensurate with the magnitude of the investment.

If you eliminate the impossible, what is left - however improbable - must be the truth. People multiply because it provides them with narcissistic supply.

A Narcissist is a person who projects a (false) image unto others and uses the interest this generates to regulate a labile and grandiose sense of self-worth. The reactions garnered by the narcissist - attention, unconditional acceptance, adulation, admiration, affirmation - are collectively known as "narcissistic supply". The narcissist objectifies people and treats them as mere instruments of gratification.

Infants go through a phase of unbridled fantasy, tyrannical behavior, and perceived omnipotence. An adult narcissist, in other words, is still stuck in his "terrible twos" and is possessed with the emotional maturity of a toddler. To some degree, we are all narcissists. Yet, as we grow, we learn to empathize and to love ourselves and others.

This edifice of maturity is severely tested by newfound parenthood.

Babies evokes in the parent the most primordial drives, protective, animalistic instincts, the desire to merge with the newborn and a sense of terror generated by such a desire (a fear of vanishing and of being assimilated). Neonates engender in their parents an emotional regression.

The parents find themselves revisiting their own childhood even as they are caring for the newborn. The crumbling of decades and layers of personal growth is accompanied by a resurgence of the aforementioned early infancy narcissistic defenses. Parents - especially new ones - are gradually transformed into narcissists by this encounter and find in their children the perfect sources of narcissistic supply, euphemistically known as love. Really it is a form of symbiotic codependence of both parties.

Even the most balanced, most mature, most psychodynamically stable of parents finds such a flood of narcissistic supply irresistible and addictive. It enhances his or her self-confidence, buttresses self esteem, regulates the sense of self-worth, and projects a complimentary image of the parent to himself or herself.

It fast becomes indispensable, especially in the emotionally vulnerable position in which the parent finds herself, with the reawakening and repetition of all the unresolved conflicts that she had with her own parents.

If this theory is true, if breeding is merely about securing prime quality narcissistic supply, then the higher the self confidence, the self esteem, the self worth of the parent, the clearer and more realistic his self image, and the more abundant his other sources of narcissistic supply - the fewer children he will have. These predictions are borne out by reality.

The higher the education and the income of adults - and, consequently, the firmer their sense of self worth - the fewer children they have. Children are perceived as counter-productive: not only is their output (narcissistic supply) redundant, they hinder the parent's professional and pecuniary progress.

The more children people can economically afford - the fewer they have. This gives the lie to the Selfish Gene hypothesis. The more educated they are, the more they know about the world and about themselves, the less they seek to procreate. The more advanced the civilization, the more efforts it invests in preventing the birth of children. Contraceptives, family planning, and abortions are typical of affluent, well informed societies.

The more plentiful the narcissistic supply afforded by other sources - the lesser the emphasis on breeding. Freud described the mechanism of sublimation: the sex drive, the Eros (libido), can be "converted", "sublimated" into other activities. All the sublimatory channels - politics and art, for instance - are narcissistic and yield narcissistic supply. They render children superfluous. Creative people have fewer children than the average or none at all. This is because they are narcissistically self sufficient.