An understanding, a secret understanding, an understanding from which the rest of the world is excluded, is of the very essence of flirtation. The entente, the agreement, may never have been made by words spoken in corners, or written in notes, but it must at least have been made in looks or, no, perhaps not by anything so definite as they, by the creation of that most impalpable but most real thing, an atmosphere, an emotional atmosphere.

When does a flirtation begin, then? It begins directly she has succeeded in convincing him (of course you may reverse the sexes) that he is more attractive to her than any of the other men about. Mind, I say in convincing him. Until he is convinced the thing has not begun; it is only an attempt at a flirtation—and to fail in such an attempt is, with one exception, the most disastrous defeat a woman can sustain. No woman can encounter two beatings of that sort and retain her self-esteem. Her amour propre is irreparably ruined. A man, on the other hand, can survive any number of rebuffs and come up smiling to face the next; for he can always comfort himself with the thought that it was the lady’s prudence and not his own unattractiveness that was responsible for the licking.

A flirtation must be without serious intent. If one of the parties to it have anything more definite in view, consciously in view, then he or she is not flirting; it is a one-sided affair. It is in no way destructive of the accuracy of my definition that most affairs are one-sided affairs.

There may be in a flirtation, there nearly always is, a sort of subtle subconsciousness of delightful possibilities, of dangerously delightful possibilities, but that is all there may be; and it is just these vague possibilities that give the salt to the dish.

Flirtation then you see, Alexa, is, like virtue, its own reward. That, I think, is the only respect in which it does resemble virtue. Like art, it must exist only for its own sake; and it is remarkably like art. Indeed, it is no inconsiderable part of the art of life. The object of art, as Pater says somewhere, is to render radiant, to intensify, our moments. That and nothing else is the object, so far as it has an object, of flirtation.

Of course it gratifies our vanity, and of all gratifications, or nearly all, the gratification of vanity is the sweetest, the one with least alloy or unpleasant after-taste. Vanity suffers from hunger, but never from indigestion, no, nor from satiety. There are few things in this world which give a man, who is a man and not a pudding, such a tingling thrill of pleasure as the consciousness that a woman, an ordinarily discreet woman, has run the ever-so-slightest risk of compromising herself for his sake.

A woman once told me—quite a nice woman, Alexa, not a cat, nothing like a cat—that life’s height was the knowledge that she could raise a man to the summits or cast him down to the depths, by giving or withholding a glance as she left the dinner-table for the drawing-room. So you see flirtation has its points as a form of sport.

Obviously then, as I said, there must be an understanding, a tacit, if temporary, alliance between the pair. They must have made a little circle for themselves, a little circle in which they two move alone, from which the rest of the world is excluded, as it were, by a burning bush. There may be a ménage à trois, indeed, I am told that the ménage à trois is one of the commonest of social phenomena, but a flirtation à trois there can never be. A woman may flirt with two men, or a man with two women, but neither of the two must know of the other’s existence or the thing falls to pieces.

It is in truth a sort of exercise preliminary to the duel of sex. The combatants are combatants only by courtesy; they fence with the buttons on the foils. So long as the game is played according to the rules, there is likely to be naught more seriously discommoding than a scratch or a tiny little blue bruise which in a day or two will disappear. But, and here is the spice of it, at any moment one of the buttons may come off by accident, or be taken off by fraud, and then—well, then certainly a garment may be torn to rags, possibly a heart may be pierced.

Where does flirtation end? you ask. Well, I can tell you where it never ends. It never ends in a row. Never, at any rate, when he or she has more brains than a guinea-pig. Of course, with downright fools there is no telling. If there be ever so slight a row, ever so faint a scandal, then there has been something more than a flirtation. The limits have been passed; a button, somehow or other, has come off a foil. When somebody is trying to get back somebody’s letters somebody has leaped the limits: be sure of that.