Whatever else we may say about sex, it is at least as much a social and psychological phenomenon as it is a biological one.

Children crawl before they walk, walk before they run--each generally a precondition for the other. And with each step they take toward more independence, more mastery of the environment, their mothers take a step away--each a small separation, a small distancing.

That myth--that image of the madonna-mother--has disabled us from knowing that, just as men are more than fathers, women are morethan mothers. It has kept us from hearing their voices when they try to tell us their aspirations . . . kept us from believing that they share with men the desire for achievement, mastery, competence--the desire to do something for themselves.

The structure of the family is not born in nature but in human design. What we can do, we can also undo.

Interesting, isn't it, that even though more than two and a half decades have passed since the sexual revolution brought women a new measure of sexual freedom, there's still no word in the language that doesn't reek with pejorative connotation to describe a woman who has sex freely. Since language frames thought and sets its limits, this is not a trivial matter. For without a word that describes without condemning, it's hard to think about it neutrally as well. When we say the words 'promiscuous woman,' therefore, it's a statement about her character, not just her sexual behavior.

In our minds lives the madonna image--the all-embracing, all- giving tranquil mother of a Raphael painting, one child at her breast, another at her feet; a woman fulfilled, one who asks nothing more than to nurture and nourish. This creature of fantasy, this myth, is the model--the unattainable ideal against which women measure, not only their performance, but their feelings about being mothers.

Contrary to all we hear about women and their empty-nest problem, it may be fathers more often than mothers who are pained by thechildren's imminent or actual departure--fathers who want to hold back the clock, to keep the children in the home for just a little longer. Repeatedly women compare their own relief to their husband's distress