They tell me they have gone through all of this for a quick thrill or a furtive moment of romance. Sometimes they tell me they don't remember making the decision that tore apart their life: "It just happened." Sometimes they don't even know they are being unfaithful. (I tell them: "If you don't know whether what you are doing is an or not, ask your spouse.")

From the outside looking in, it is insane. How could anyone risk everything in life on the turn of a screw? Infidelity was not something people did much in my family, so I always found it strange and noteworthy when people did it in my practice. After almost 30 years of cleaning up the mess after other people's affairs, I wrote a book describing everything about infidelity I'd seen in my practice. The book was Private Lies: Infidelity and the Betrayal of (Norton). I thought it might help. Even if the tragedy of AIDS and the of prominent politicians hadn't stopped it, surely people could not continue screwing around after reading about the absurd destructiveness of it. As you know, people have not stopped having affairs. But many of them feel the need to write or call or drop by and talk to me about it. When I wrote Private Lies, I thought I knew everything there was to know about infidelity. But I know now that there is even more.

Accidental Infidelity

All affairs are not alike. The thousands of affairs I've seen seem to fall into four broad categories. Most first affairs are cases of accidental infidelity, unintended and uncharacteristic acts of carelessness that really did "just happen." Someone will get drunk, will get caught up in the moment—will just be having a bad day. It can happen to anyone, though some people are more accident prone than others, and some situations are accident zones.

Many times a young man has started his as a philanderer quite accidentally when he is traveling out of town on a new job with a philandering boss who chooses one of a pair of women and expects the young fellow to entertain the other. The most startling dynamic behind accidental infidelity is misplaced politeness, the feeling that it would be rude to turn down a needy friend's sexual advances. In the debonair gallantry of the moment, the brazen discourtesy to the marriage partner is overlooked altogether.

Both men and women can slip up and have accidental affairs, though the most accident-prone are those who drink, those who travel, those who don't get asked much, those who don't feel very tightly married, those whose running buddies screw around, and those who are afraid to run from a challenge. Most are men.

After an accidental infidelity, there is clearly the sense that one's life and marriage have changed. The choices are:

To decide that infidelity was a stupid thing to do, to confess it or not to do so, but to resolve to take better precautions in the future; To decide you wouldn't have done such a thing unless your husband or wife had let you down, put the blame on your mate, and go home and pick your marriage to death; To notice that lightning did not strike you dead, decide this would be a safe and inexpensive hobby to take up, and do it some more; To decide that you would not have done such a thing if you were married to the right person, determine that this was meant to be, and declare yourself in love with the stranger in the bed.

Romantic Infidelity

Surely the craziest and most destructive form of infidelity is the temporary insanity of falling in love. You do this, not when you meet somebody wonderful (wonderful people don't screw around with married people) but when you are going through a crisis in your own life, can't continue living your life, and aren't quite ready for suicide yet. An affair with someone grossly inappropriate—someone decades younger or older, someone dependent or dominating, someone with problems even bigger than your own—is so crazily stimulating that it's like a drug that can lift you out of your and enable you to feel things again. Of course, between moments of ecstasy, you are more depressed, increasingly alone and alienated in your life, and increasingly hooked on the affair partner. Ideal romance partners are damsels or "dumsels" in distress, people without a life but with a lot of problems, people with bad reality testing and little concern with understanding reality better.

Romantic affairs lead to a great many divorces, suicides, homicides, heart attacks, and strokes, but not to very many successful remarriages. No matter how many sacrifices you make to keep the love alive, no matter how many sacrifices your family and children make for this crazy relationship, it will gradually burn itself out when there is nothing more to sacrifice to it. Then you must face not only the wreckage of several lives, but the original depression from which the affair was an insane flight into escape.

People are most likely to get into these romantic affairs at the turning points of life: when their parents die or their children grow up; when they suffer health crises or are under pressure to give up an ; when they achieve an unexpected level of job success or job failure; or when their first child is born—any situation in which they must face a lot of reality and grow up. The better the marriage, the saner and more sensible the spouse, the more alienated the romantic is likely to feel. Romantic affairs happen in good marriages even more often than in bad ones.

Both genders seem equally capable of falling into the temporary insanity of romantic affairs, though women are more likely to reframe anything they do as having been done for love. Women in love are far more aware of what they are doing and what the dangers might be. Men in love can be extraordinarily incautious and willing to give up everything. Men in love lose their heads—at least for a while.

Marital Arrangements

All marriages are imperfect, and probably a disappointment in one way or another, which is a piece of reality, not a license to mess around with the neighbors. There are some marriages that fail to provide a modicum of warmth, sex, sanity, companionship, money. There are awful marriages people can't get all the way into and can't get all the way out of, divorces people won't call off and can't go through, marriages that won't die and won't recover. Often people in such marriages make a marital arrangement by calling in marital aides to keep them company while they avoid living their life. Such practical affairs help them keep the marriage steady but distant. They thus encapsulate the marital deficiency, so the infidel can neither establish a life without the problems nor solve them. Affairs can wreck a good marriage, but can help stabilize a bad one.

People who get into marital arrangements are not necessarily the innocent victims of defective relationships. Some set out to keep their marriages defective and distant. I have seen men who have kept the same mistress through several marriages, arranging their marriages to serve some practical purpose while keeping their romance safely encapsulated elsewhere. The men considered it a victory over marriage; the exploited wives were outraged.

I encountered one woman who had long been involved with a married man. She got tired of waiting for him to get a and married someone else. She didn't tell her husband about her affair, and she didn't tell her affaire about her marriage. She somehow thought they would never find out about one another. After a few exhausting and confusing weeks, the men met and confronted her. She cheerfully told them she loved them both and the arrangement seemed the sensible way to have her cake and eat it too. She couldn't understand why both the men felt cheated and deprived by her efforts to sacrifice their lives to satisfy her skittishness about total commitment.

Some of these arrangements can get quite complicated. One woman supported her house-husband and their kids by living as the mistress of an older married man, who spent his afternoons and weekend days with her and his evenings at home with his own children and his sexually boring wife. People averse to conflict might prefer such arrangements to , or any other effort to actually solve the problems of the marriage.

Unhappily married people of either can establish marital arrangements to help them through the night. But men are more likely to focus on the practicality of the arrangement and diminish awareness of any threat to the stability of the marriage, while women are more likely to romanticize the arrangement and convince themselves it is leading toward an eventual union with the romantic partner. Networks of couples may spend their lives halfway through someone's divorce, usually with a -ridden man reluctant to completely leave a marriage he has betrayed and even deserted, and a woman, no matter how hard she protests to the contrary, eternally hopeful for a wedding in the future.

Philandering

Philandering is a predominantly male activity. Philanderers take up infidelity as a hobby. Philanderers are likely to have a rigid and concrete concept of gender; they worship masculinity, and while they may be greatly attracted to women, they are mostly interested in having the woman affirm their masculinity. They don't really like women, and they certainly don't want an equal, intimate relationship with a member of the gender they insist is inferior, but far too powerful. They see women as dangerous, since women have the ability to assess a man's worth, to measure him and find him wanting, to determine whether he is man enough.

These men may or may not like sex, but they use it compulsively to affirm their masculinity and overcome both their homophobia and their of women. They can be cruel, abusive, and even violent to women who try to get control of them and stop the philandering they consider crucial to their masculinity. Their life is centered around displays of masculinity, however they define it, trying to impress women with their physical strength, competitive victories, seductive skills, mastery of all situations, power, wealth, and, if necessary, violence. Some of them are quite charming and have no trouble finding women eager to be abused by them.

Gay men can philander too, and the dynamics are the same for gay philanderers as for straight ones: the obvious avoidance of female sexual control, but also preoccupation with masculinity and the use of rampant for both reassurance and the measurement of manhood. When men have paid such an enormous social and interpersonal price for their preferred sexuality, they are likely to wrap an enormous amount of their around their sexuality and express that sexuality extensively.

Philanderers may be the sons of philanderers, or they may have learned their ideas about marriage and gender from their ethnic group or inadvertently from their religion. Somewhere they have gotten the idea that their masculinity is their most valuable attribute and it requires them to protect themselves from coming under female control. These guys may consider themselves quite principled and honorable, and they may follow the rules to the letter in their dealings with other men. But in their world women have no rights.

To men they may seem normal, but women experience them as or even . They think they are normal, that they are doing what every other real man would do if he weren't such a wimp. The notions of marital fidelity, of gender equality, of honesty and intimacy between husbands and wives seem quite foreign from what they learned growing up. The gender equality of may not feel compatible to men steeped in patriarchal beliefs in men being gods and women being ribs. Monogamous sexuality is difficult for men who worship Madonnas for their sexlessness and berate Eves for their seductiveness.

Philanderers' sexuality is fueled by and fear, and while they may be considered "sex addicts" they are really "gender compulsives" desperately doing whatever they think will make them look and feel most masculine. They put notches on their belts in hopes it will make their penises grow bigger. If they can get a woman to die for them, like opera composer Giacomo Puccini did in real life and in most of his operas, they feel like a real man.

Female Philanderers

There are female philanderers too, and they too are usually the daughters or ex-wives of philanderers. They are angry at men, because they believe all men screw around as their father or ex-husband did. A female philanderer is not likely to stay married for very long, since that would require her to make peace with a man, and as a woman to carry more than her share of the burden of marriage. Marriage grounds people in reality rather than transporting them into fantasy, so marriage is too loving, too demanding, too realistic, and not romantic enough for them.

I hear stories of female philanderers, such as Maria Riva's description of her mother, Marlene Dietrich. They appear to have insatiable sexual appetites but, on closer examination, they don't like sex much. They do like power over men, and underneath the philandering anger, they are plaintively seeking love.

Straying wives are rarely philanderers, but single women who mess around with married men are quite likely to be. Female philanderers prefer to raid other people's marriages, breaking up relationships, doing as much damage as possible, and then dancing off reaffirmed. Like male philanderers, female philanderers put their victims through all of this just to give themselves a sense of gender power.

Spider Woman

There are women who, by nature romantics, don't quite want to escape their own life and die for love. Instead they'd rather have some guy wreck his life for them. These women have been so recently betrayed by unfaithful men that the wound is still raw and they are out for . A woman who angrily pursues married men is a "spider woman"—she requires human sacrifice to restore her sense of power.

When she is sucking the blood from other people's marriages, she feels some relief from the pain of having her own marriage betrayed. She simply requires that a man love her enough to sacrifice his life for her. She may be particularly attracted to happy marriages, clearly of the woman whose husband is faithful and loving to her. Sometimes it isn't clear whether she wants to replace the happy wife or just make her miserable.

The women who are least squeamish and most likely to wreak havoc on other people's marriages are victims of some sort of abuse, so angry that they don't feel bound by the usual rules or obligations, so desperate that they cling to any source of security, and so miserable that they don't bother to think a bit of the end of it.

Josephine Hart's novel Damage, and the Louis Malle film version of it, describe such a woman. She seduces her fiancee's depressed father, and after the fiancee discovers the affair and kills himself, she waltzes off from the wreckage of all the lives. She explains that her father disappeared long ago, her mother had been married four or five times, and her brother committed suicide when she left his bed and began to date other boys. She describes herself as damaged, and says: "Damaged people are dangerous. They know they can survive."

Bette was a spider woman. She came to see me only once, with her married affair partner Alvin, a man I had been seeing with his wife Agnes. But I kept up with her through the many people whose lives she touched. Bette's father had run off and left her and her mother when she was just a child, and her stepfather had exposed himself to her. Most recently Bette's husband Burt had run off with a stripper, Claudia, and had briefly married her before he crashed and went into a hospital.

While Burt was with Claudia, the enraged Bette promptly latched on to Alvin, a laid-back philanderer who had been married to Agnes for decades and had been screwing around casually most of that time. Bette was determined that Alvin was going to divorce Agnes and marry her, desert his children, and raise her now-fatherless kids. The normally cheerful Alvin, who had done a good job for a lifetime of pleasing every woman he met and avoiding getting trapped by any of them, couldn't seem to escape Bette, but he certainly had no desire to leave Agnes. He grew increasingly depressed and . He felt better after he told the long-suffering Agnes, but he still couldn't move in any direction. Over the next couple of years, Bette and Alvin took turns threatening suicide, while Agnes tended her garden, raised her children, ran her business, and waited for the increasingly disoriented and pathetic Alvin to come to his senses.

Agnes finally became sufficiently alarmed about her husband's deterioration that she decided the only way she could save his life was to divorce him. She did, and Alvin promptly dumped Bette. He could not forgive her for what she had made him do to dear, sweet Agnes. He lost no time in taking up with Darlene, with whom he had been for some time, but who wouldn't go out with a married man. Agnes felt relief, and the comfort of a good settlement, but Bette was once again abandoned and desperate.

She called Alvin hourly, alternately threatening suicide, reciting erotic poetry, and offering to fix him dinner. She phoned bomb threats to Darlene's office. Bette called me to tell me what a sociopathic jerk Alvin was to betray her with another woman after all she had done in helping him through his divorce. She wrote sisterly notes to Agnes, offering the comfort of to help one another through the awful experience of being betrayed by this terrible man. At no point did Bette consider that she had done anything wrong. She was now, as she had been all her life, a victim of men, who not only use and abuse women, but won't lay down their lives to rescue them on cue.

Emotionally Retarded Men in Love

About the only people more dangerous than philandering men going through life with an open fly and romantic damsels going through life in perennial distress, are emotionally retarded men in love. When such men go through a difficult transition in life, they hunker down and ignore all emotions. Their brain chemistry gets depressed, but they don't know how to feel it as depression. Their loved ones try to keep from bothering them, try to keep things calm and serene and isolate them further.

An emotionally retarded man may go for a time without feeling pleasure, pain, or anything else, until a strange woman jerks him back into awareness of something intense enough for him to feel it—perhaps sexual fireworks, or the boyish heroics of rescuing her, or perhaps just fascination with her constantly changing moods and never-ending emotional crises.

With her, he can pull out of his depression briefly, but he sinks back even deeper into it when he is not with her. He is getting addicted to her, but he doesn't know that. He only feels the absence of joy and love and life with his serenely cautious wife and kids, and the awareness of life with this new woman. It doesn't work for him to leave home to be with her, as she too would grow stale and irritating if she were around full time.

What he needs is not a crazier woman to sacrifice his life for, but treatment for his depression. However, since the best home remedies for depression are sex, exercise, joy, and triumph, the dangerous damsel may be providing one or more of them in a big enough dose to make him feel a lot better. He may feel pretty good until he gets the bill, and sees how much of his life and the lives of his loved ones this treatment is costing. Marriages that start this way, stepping over the bodies of loved ones as the giddy couple walks down the aisle, are not likely to last long.

Howard had been faithful to Harriett for 16 years. He had been happy with her. She made him feel loved, which no one else had ever tried to do. Howard devoted himself to doing the right thing. He always did what he was supposed to do and he never complained. In fact he said very little at all.

Howard worked at Harriett's father's store, a stylish and expensive mews clothiers. He had worked there in high school and returned after college. He'd never had another job. He had felt like a son to his father-in-law. But when the old man retired, he bypassed the stalwart, loyal Howard and made his own wastrel son manager.

Howard also took care of his own elderly parents who lived next door. His father died, and left a nice little estate to his mother, who then gave much of it to his younger brother, who had gotten into trouble with gambling and extravagance.

Howard felt betrayed, and sank into a depression. He talked of quitting his job and moving away. Harriett pointed out the impracticality of that for the kids. She reminded him of all the good qualities of his mother and her father.

Howard didn't bring it up again. Instead, he began to talk to Maxine, one of the tailors at the store, a tired middle-aged woman who shared Howard's disillusionment with the world. One day, Maxine called frightened because she smelled gas in her trailer and her third ex-husband had threatened to hurt her. She needed for Howard to come out and see if he could smell anything dangerous. He did, and somehow ended up in bed with Maxine. He felt in love. He knew it was crazy but he couldn't get along without her. He bailed her out of the frequent disasters in her life. They began to plot their getaway, which consumed his for months.

Harriett noticed the change in Howard, but thought he was just his father's death. They continued to get along well, sex was as good as ever, and they enjoyed the same things they had always enjoyed. It was a shock to her when he told her he was moving out, that he didn't love her anymore, and that it had nothing whatever to do with Maxine, who would be leaving with him.

Harriett went into a rage and hit him. The children went berserk. The younger daughter cried inconsolably, the older one , the son quit school and refused to leave his room. I saw the family a few times, but Howard would not turn back. He left with Maxine, and would not return my phone calls. The kids were carrying on so on the telephone, Howard stopped calling them for a few months, not wanting to upset them. Meanwhile he and Maxine, who had left her kids behind as well, borrowed some money from his mother and moved to the coast where they bought into a marina—the only thing they had in common was the pleasure of fishing.

A year later, Harriet and the kids were still in therapy but they were getting along pretty well without him. Harriett was running the clothing store. Howard decided he missed his children and invited them to go fishing with him and Maxine. It surprised him when they still refused to speak to him. He called me and complained to me that his depression was a great deal worse. The marina was doing badly. He and Maxine weren't getting along very well. He missed his children and cried a lot, and she told him his preoccupation with his children was a betrayal of her. He blamed Harriett for fussing at him when she found out about Maxine. He believed she turned the children against him. He couldn't understand why anyone would be mad with him; he couldn't help who he loves and who he doesn't love.

Men and Women Who Cheat

Howard's failure to understand the complex emotional consequences of his affair is typically male, just as Bette's insistence that her affair partner live up to her romantic is typically female. Any gender-based generalization is both irritating and inaccurate, but some behaviors are typical. Men tend to attach too little significance to affairs, ignoring their horrifying power to disorient and disrupt lives, while women tend to attach too much significance, assuming that the emotions are so powerful they must be "real" and therefore concrete, permanent, and stable enough to risk a life for.

A man, especially a philandering man, may feel comfortable having sex with a woman if it is clear that he is not in love with her. Even when a man understands that a rule has been broken and he expects consequences of some sort, he routinely underestimates the extent and range and duration of the reactions to his betrayal. Men may agree that the sex is wrong, but may believe that the is a noble effort to protect the family. A man may reason that outside sex is wrong because there is a rule against it, without understanding that his lying establishes an adversarial relationship with his mate and is the greater offense. Men are often surprised at the intensity of their betrayed mate's anger, and then even more surprised when she is willing to take him back. Men rarely appreciate the devastating long-range impact of their infidelities, or even their divorces, on their children.

Routinely, a man will tell me that he assured himself that he loved his wife before he hopped into a strange bed, that the woman there with him means nothing, that it is just a meaningless roll in the hay. A woman is more likely to tell me that at the sound of the zipper she quickly ascertained that she was not as much in love with her husband as she should have been, and the man there in bed with her was the true love of her life.

A woman seems likely to be less concerned with the letter of the law than with the emotional coherence of her life. It may be okay to screw a man if she "loves" him, whatever the status of his or her marriage, and it is certainly appropriate to lie to a man who believes he has a claim on you, but whom you don't love.

Women may be more concerned with the impact of their affairs on their children than they are with the effect on their mate, whom they have already devalued and discounted in anticipation of the affair. Of course, a woman is likely to feel the children would be in support of her affair, and thus may involve them in relaying her messages, keeping her secrets, and telling her lies. This can be mind-blowingly seductive and confusing to the kids. Sharing the secret of one parent's affair, and hiding it from the other parent, has essentially the same emotional impact as incest.

Some conventional about gender differences in infidelity is true.

More men than women do have affairs, but it seemed to me that before the AIDS epidemic, the rate for men was dropping (philandering has not been considered cute since the Kennedy's went out of power) and the rate for women was rising (women who assumed that all men were screwing around saw their own screwing around as a blow for equal rights.) In recent years, promiscuity seems suicidal so only the suicidal—that is, the romantics—are on the streets after dark.

Men are able to approach sex more casually than women, a factor not only of the patriarchal double standard but also of the difference between having genitals on the outside and having them on the inside. Getting laid for all the wrong reasons is a lot less dangerous than falling in love with all the wrong people.

Men who get caught screwing around are more likely to be honest about the sex than women. Men will confess the full sexual details, even if they are vague about the emotions. Women on the other hand will confess to total consuming love and suicidal desire to die with some man, while insisting no sex ever took place. I would believe that if I'd ever seen a man describe the affair as so consumingly intense from the waist up and so chaste from the waist down. I assume these women are lying to me about what they know they did or did not do, while I assume that the men really are honest about the genital ups and downs—and honestly confused about the emotional ones.

Women are more likely to discuss their love affairs with their women friends. Philandering men may turn their sex lives into a spectator sport but romantic men tend to keep their love life private from their men friends, and often just withdraw from their friends during the romance.

On the other hand, women are not more romantic than men. Men in love are every bit as foolish and a lot more naive than women in love. They go crazier and risk more. They are far more likely to sacrifice or abandon their children to prove their love to some recent affaire. They are more likely to isolate themselves from everyone except their affair partner, and turn their thinking and feeling over to her, applying her romantic ways of thinking (or not thinking) to the dilemmas of his increasingly chaotic life.

Men are just as as women of their mates' affairs. They might claim ahead of time that they would never tolerate it, but when push comes to shove, cuckolded men are every bit as likely as cuckolded women to fight like tigers to hold on to a marriage that has been betrayed. Cuckolded men may react violently at first, though cuckolded women do so as well, and I've seen more cases of women who shot and wounded or killed errant husbands. (The shootings occur not when the affair is stopped and confessed, but when it is continued and denied.)

Betrayed men, like betrayed women, hunker down and do whatever they have to do to hold their marriage together. A few men and women go into a rage and refuse to turn back, and then spend a lifetime nursing the narcissistic injury, but that unusual occurrence is no more common for men than for women. Marriage can survive either a husband's infidelity or a wife's, if it is stopped, brought into the open, and dealt with.

I have cleaned up more affairs than a squad of motel chambermaids. Infidelity is a very messy hobby. It is not an effective way to find a new mate or a new life.

It is not a safe treatment for depression, boredom, imperfect marriage, or inadequate gender splendor. And it certainly does not impress the rest of us. It does not work for women any better than it does for men. It does excite the senses and the imaginations of those who merely hear the tales of lives and deaths for love, who melt at the sound of liebestods or country songs of love gone wrong.

I think I've gotten more from infidelity as an observer than all the participants I've seen. Infidelity is a spectator sport like shark feeding or bull fighting—that is, great for those innocent bystanders who are careful not to get their feet, or whatever, wet. For the greatest enjoyment of infidelity, I recommend you observe from a safe physical and emotional distance and avoid any suicidal impulse to become a participant.