There is vast variety in mating strategies across genders, cultures and environments. Similar mating strategies are used by both men and women. They have also evolved to use broadly distinct strategies.
Sex similarities Assortative mating Human mating is inherently non-random. such as genetics, quantitative phenotypes like height or
body-mass index, skin pigmentation, the level of physical attractiveness, disease risk (including cancers and mental disorders), race or ethnicity, facial features, cultural backgrounds, moral values, religious beliefs, political orientation, (perceived)
personality traits (such as conscientiousness or extraversion), behavioral characteristics and IQ or
general intelligence. Furthermore, in the past, marriage across status lines was more common. Women typically looked for a man of high status (
hypergamy), a sign of access to resources. Men, for their part, were usually willing to marry down the socioeconomic ladder (hypogamy) if the woman possessed domestic skills, or was young and good looking (proxies of fertility). For this reason, when judging the value of a potential mate, people commonly consider the other person's grasp of grammar (a proxy of socioeconomic status of educational level), teeth quality (indicators of health and age), and self-confidence (psychological stability). while height is one of the most heritable, with mating partners sharing 89% of the genetic variations affecting the preference for height. Public secondary school is the last time people of various backgrounds are lumped together in the same setting. After that, they begin sorting themselves out by various measures of social screening. Among those marrying late (relative to the time when they left school), socioeconomic status is especially important. In societies where the numbers of highly educated and career-minded women are increasing, the role of socioeconomic status is likely to be even more important in the future. However, a growing number of women are avoiding relationships with men altogether. and increases genetic similarity between family members, whereupon in-group altruism and
inclusive fitness are enhanced. On the other hand, there is evolutionary pressure against mating with people too genetically similar to oneself, such as members of the same nuclear family. Children of more distantly related cousins have less risk of these disorders, though still higher than the average population. Therefore, humans tend to maximize the genetic similarity of their mates while avoiding excessive
inbreeding or
incest. In general, humans seem to prefer mates who are (the equivalent of) second or higher-parity cousins. Genetic analyses of the United States suggest that the genomic correlation between spouses is comparable to that between second cousins. Another study indicated that between 1800 and 1965 in Iceland, more children and grandchildren were produced from marriages between third or fourth cousins (people with common great-great- or great-great-great-grandparents) than from other degrees of
consanguinity. In the past, there was indeed some awareness of the dangers of inbreeding, as can be seen in legal prohibitions in some societies, while in the current era, better transportation infrastructure makes it less likely to occur. In
Roman Egypt, marriage between (biological) siblings was accepted. France dropped incest from its legal code during the
Napoleonic era, though it remains illegal for siblings to marry. On the other hand, many parts of the United States have proscribed first-cousin marriage since the nineteenth century. There is no evidence that the actual prevalence of incest is affected by its legal status. This promotes MHC heterogeneity in their offspring, making them more resistant to pathogens. Another example of negative assortative mating is among people with traits linked to high testosterone (such as analytical thinking and
spatial reasoning) and those traits due to high estrogen (
empathy and social skills). They generally find each other appealing. Assortative mating is partly due to social effects. For instance, religious people are more likely to meet their potential mates in their places of worship while highly educated people typically meet their future spouses in institutions of higher learning.
Pleiotropy, or the phenomenon in which a single gene can influence multiple traits, and assortative mating are responsible for the correlations between some sexually selected traits in humans, such as height and IQ, which are weakly positively correlated. In a knowledge-based economy, educational and socioeconomic assortative mating contributes to the growth in household income inequality, as parents with higher incomes and levels of education tend to invest more in their offspring, giving them an edge later in life.
Dating . Humans engage in dating or courtship in order to assess their suitability as potential mates. People date to assess each other's suitability as a partner in an
intimate relationship or as a spouse. Dating rules may vary across different cultures, and some societies may even replace the dating process by a
courtship instead.
Double standards and infidelity Both men and women apply one set of standards for themselves and another for their partners. They disapprove of their partners examining other options, but may very well do so themselves. Some even get worried if their partners are not
jealous enough. This sexual double standard can be explained by the biological sex difference between men and women; no matter how he acts, a man can never become pregnant. humans sometimes flirt just for fun.
Kissing Kissing is an activity found in many different
species of animals. Although romantic or sexual kissing confers no known benefits for survival and reproduction, it is hypothesized that, like other primates, humans kiss to determine the health and suitability of a potential mate, for example by olfactory signals. It is possible that there was kissing between anatomically modern humans (
Homo sapiens) and the now extinct
Neanderthals, perhaps as early as 100,000 years ago, as suggested by studying the spread of the orally transmitted microorganism
Methanobrevibacter oralis. Written historical evidence suggests that this practice arose independently in different complex or stratified societies, such as India,
Mesopotamia, and Egypt during the early
Bronze Age, some centuries after the
invention of writing, but did not necessarily spread to other places. Kissing is also more common in colder climates. As of 2024, the oldest known textual reference to romantic or sexual kissing is a
clay tablet from the
Sumerian city of
Nippur (in modern-day Iraq), dated 2,400 B.C., depicting the copulation of
deities—
Enlil, king of the gods, and the mother goddess
Ninhursag. Another early description of kissing in the mating context comes from India in 1,500 B.C. when the oral tradition of the
Vedic Sanskrit was being transcribed. In the aforementioned Sumerian clay tablet, however, kissing is done post-coitus. Indeed, in many cultures today, such as Sudan, kissing on the mouth is thought to be rude or unsanitary.
Matchmaking , marital norms have been centered on the accumulation and preservation of the
family fortune. It was also common for families to
arrange a marriage as a transaction for the sake of political or economic expediency. In many cultural traditions, a date may be arranged by a third party, who may be a family member, acquaintance, or (professional)
matchmaker. Such a matchmaker could be also a religious leader in a community where religious attendance is common. In these cultures, the onset of
puberty remains a marker of readiness for marriage. According to their traditional viewpoints, marrying off a young teenage girl is a way to prevent her from having premarital sexual intercourse and to "protect" her from sexual assault. This service feeds data shared by users into
machine-learning algorithms to find the
optimal match. Because males generally pursue short-term mating strategies, their overall reproductive success is higher than that of females, however it is also more variable. This means that males are able to have more offspring on average, however only relatively few males are able to have a very large number of offspring. Due to this short-mating strategy, males have a greater desire for sexual variety, need less time to consent to intercourse, and seek short-term mates more than females. However, females also pursue short-term mates, but the motivations differ from males. Females can benefit from short-term mating in numerous ways. First, it allows for a quick extraction of resources. Women in a stressed situation may benefit from protection from a male and short term mating is a way to achieve this as is seen in contemporary asylum seeker anthropological studies. One prominent hypothesis is that ancestral women selectively engaged in short-term mating with men capable of transmitting genetic benefits to their offspring such as health, disease resistance, or attractiveness (see
good genes theory and
sexy son hypothesis). Since women cannot inspect men's genes directly, they may have evolved to infer genetic quality from certain observable characteristics (see
indicator traits). One prominent candidate for a "good genes" indicator includes absence of
fluctuating asymmetry, or the degree to which men have perfect bodily symmetry. Other candidates include masculine facial features, behavioral dominance, and low vocal pitch. Evolutionary psychologists have therefore indicated that women pursuing a short-term mating strategy have higher preferences for these good gene indicators, and men who possess good genes indicators are more successful in pursuing short-term mating strategies than men who do not. Indeed, research indicates that self-perceived physical attractiveness, absence of fluctuating asymmetry, and low vocal pitch are positively related to short-term mating success in men but not in women. Conversely, long-term mating is marked by serious committed sexual relationships with relatively few partners. While males generally pursue a short-term mating strategy when possible, females typically pursue a long-term mating strategy. Additionally, they also benefit from higher parental investment by males. Women are thought to seek long-term partners with resources (such as shelter and food) that provide aid and support survival of offspring. To achieve this, women are thought to have evolved
extended sexuality. The key benefit for males pursuing a long-term strategy is higher parental certainty. Additionally, humans typically do not pursue the extremes of either short or long-term mating strategies. It is possible that females are more prone to
psychological depression than males if they are subject to
K-selection. Because women's reproductive decisions are made with more risks then men's,
postpartum depression could be a signal to women that they faced a bad investment opportunity, would be evolutionarily adaptive. By the same token, some researchers hypothesized that postpartum depression is more likely to occur in mothers who are suffering a
fitness cost, in order to inform them that they should reduce or
withdraw investment in their infants. Moreover, there is some evidence that postpartum depression could function as a
bargaining strategy, in which parents who were not receiving adequate support from their partners withdrew their investment in order to elicit additional support. In support of this, Hagen found that postpartum depression in one spouse was related to increased levels of child investment in the other spouse.
Determination of mate value . Male mate value depends on his access to resources while female mate value lies in her youth and fertility. determined by ability of said individual to produce healthy offspring in the future, based on his or her age and sex. meaning individuals with a high mate value are perceived to be more attractive by the opposite sex than those with low mate value. Conversely, cues have not been selected for to carry meaning, but instead are byproducts. One the other hand, signals that are not costly enough can be faked and therefore are not associated with the underlying traits. Philosopher
Jean de La Bruyère argued that it was better to be "a beautiful girl from the age of thirteen to the age of twenty-two and then after that to be a man." The features that men find physically attractive in women are thought to signal health and
fertility, as well as high estrogen and low testosterone. the fact that her breasts do not yet sag, In general, the female
body shape is largely due to her bodily fat distribution, spread across much of her body. On average, about a quarter of a woman's body consists of fat, twice as much as a man's. This body fat was a valuable asset for childcare in ancestral times when humans spread across the globe and had to confront novel environments as well as frequent famines. A mother's WHR before pregnancy is correlated with her child's
cognitive ability, as hip fat, which contains long chain
polyunsaturated fatty acids, critical for the development of the fetus's brain. Another reason is the fact that women, not men, give birth, and they do so between their legs. As a result, women's
pelvic girdles—evolved to be a compromise between the ease of childbearing and mobility—are wider on average than men's. For men, women with the
hourglass figure, that is, low WHRs, are the most attractive. there are differences with regards to what the ideal WHR is, ranging from 0.6 in China, South America, and some of Africa to 0.8 in Cameroon and among the Hadza tribe of Tanzania. In the United States, divergent preferences of African- and European-Americans have been observed. However, this gap has narrowed in the early twenty-first century, suggesting a degree of flexibility. Indeed, there is evidence of variation across time, even within a single culture or civilization. In the Western world, the ideal WHR, as seen in artworks, was approximately constant at around 0.74 in ancient times (500 B.C. to A.D. 400) but declined between the
early modern period to the early twentieth century. (Women are rarely
depicted in the nude in medieval European art due to a ban by the Church.) From around 1960 to present, this decline has slowed or even reversed, judging from the WHRs of
Playboy models and
Miss America contestants. Nevertheless, they have never exceeded 0.85, which is what the World Health Organization currently recommends for women. Medical research indicates that the WHR is a more accurate measure of bodily fat and predictor of mortality than the
body mass index. In general, however, perceived physical beauty is a matter of biology, rather than simple proportions or ratios of integers (
rational numbers). On the other hand, male mate value depends on social status and access to resources, which come with age, Indeed, a man's mate value generally increases until later in middle age. Ancestral women who opted to mate with such men would have left more descendants than those who did not. Indeed, on average, a man has greater muscle mass than a woman,Unlike in other animals, human
genitals or
pubic regions have not evolved to be (visual) sexual signals. Their sizes and shapes are merely what is necessary for copulation, and, in the case of women, childbearing. Among women not taking the hormone contraceptive pill, their olfactory and visual senses convergently guide them towards men exhibiting the least amount of
fluctuating asymmetry during the most fertile periods of their menstrual cycles. Whereas in the past, women usually had shorter lives because many of them died during childbirth, this is no longer the case thanks to modern medicine, which has made the sexes more equal by causing
maternal mortality rates to plummet. From an evolutionary point of view, women are far more valuable as reproductive units than men. For this reason, although men tend to be physically stronger, women generally have better immune systems and are less likely to suffer from (acute) depression and to commit suicide. This is defined as the ratio of marriage-age males to marriage-age females, with a high ratio representing more males and a low ratio representing more females in the local area. When there is an imbalance of sexes, the rare sex typically has more choice, while the plentiful sex has to compete more strategically for the rare sex. This leads to the plentiful sex competing on specific areas that the rare sex finds attractive. Additionally, the plentiful sex will adopt more of the rare sex's mating strategy. In a population with a low sex ratio, females will adopt a more short-term mating strategy and will compete more intensely on things like physical attractiveness. On the other hand, in a society with a high sex ratio, males will adopt a more long-term strategy to attractive females. (See
going steady.) For example, in the major metropolitan areas of China, females are generally in short supply and as such are more likely to be fulfilled should they find a mate while many men are simply left out of the dating market. On the other hand, on the Island of Manhattan and in some Western university campuses, females are in excess and as such they compete intensely for male attention, giving rise to
hookup culture and short-term mating websites such as
Tinder. Schmitt assessed relationships between several societal-level variables and average scores on the SOI. One variable that was shown to significantly predict a nation's average SOI score was the Operational Sex Ratio (OSR). This prediction was confirmed; OSR was significantly positively correlated with national SOI scores. Evolutionary psychologists therefore argue that ancestral men who possessed a desire for multiple short-term sex partners, to the extent that they were capable of attracting them, would have left more descendants than men without such a desire. Ancestral women, by contrast, would have maximized reproductive success not by mating with as many men as possible, but by selectively mating with those men who were most able and willing to invest resources in their offspring. Gradually in a bid to compete to get resources from potential men, women have evolved to show
extended sexuality, that is, the ability and willingness to copulate despite being infertile. Like a number of other primates, humans do engage in non-procreative sexual intercourse in different ways and can do so multiple times per day without conceiving offspring. According to anthropologists and psychologists, the reasons why people have sex other than reproduction are to signal affection, to provide pain relief and comfort, to
authenticate a romantic relationship, to derive
economic or political benefits, to engage in athletic activity, to offer and receive pleasure, or to cure boredom. Unlike other species, it is even possible for a human couple to
copulate while the woman is pregnant. It makes evolutionary sense for men to want to copulate with as many female partners as possible in order to spread their genetic materials a widely as possible, thereby maximizing their reproductive success, regardless of whether or not they are interested in committing to a new family. and an interest in earlier
fornication in a relationship. Evolutionary mechanisms for short-term mating can be observed today. Mate-guarding behaviors and sexual jealousy point to an evolutionary history in which sexual relations with multiple partners was frequent. Meanwhile, the general willingness of modern-day men to have sex with attractive strangers, Despite having to bear the costs of pregnancy, childbirth, and nurturing offspring, and to face the danger of single parenthood, females do not always resist the sexual advances of males. By comparing the actual numbers of condoms sold each year, the percentage of women of child-bearing age using contraception, and the number of new pregnancies in the United States, data scientist Seth Stephens-Davidowitz came to the conclusion that self-reports tend to overestimate how often people were engaging in sexual intercourse. Feelings of love motivate individuals to stay with their current partners and forego from alternatives. Proclamations of love and commitment increase the level of
oxytocin, a hormone associated with social bonding and love, in the bloodstream. Nevertheless, remaining a bonded pair can be difficult, especially in the presence of alternative mates. In the presence of desirable alternatives, humans tend to view their current relationships less favorably. Yet there are psychological counter-measures to these processes. First, individuals in a committed relationship tend to devalue alternative mate options, thus finding them less attractive. Second, humans do not always consider potential alternatives. Instead they pay less attention to alternative mates and therefore do not undergo the devaluation process. These mechanisms tend to happen unconsciously and help them maintain their current relationships. There are several strategies that an individual can do to retain their mate, especially if their mate is of high value. From an evolutionary perspective, jealousy is a cognitive adaptation to deal with the possibility of mate loss, motivating an individual to take actions in order keep their current mate. But there are sex differences on what make humans jealous. Since males have issues confirming parental certainty, something that does not happen to females, they become more jealous than females for sexual cheating. Indeed, the majority of adult women who fall victim to
felonious homicide were murdered by their husbands or boyfriends, with the most frequent reason being real or suspected infidelity. Females, on the other hand, have historically needed male resources for offspring investment. Therefore, females are more concerned with emotional cheating, as it threatens the devotion of resources to them and their offspring. As previous mentioned, sexual intercourse can facilitate pair-bonding. As previously mentioned, human genitals have not evolved to be sexual displays or signals, unlike in other animals. In the case of a male penis, however, while its length helps it deposit sperm further up the vagina, its width increases the friction with the vaginal walls, sexually arousing and pleasing the woman. In consequence, it enhances the coital experience and strengthens the emotional bond between man and woman. Small but thoughtful gestures of affection may be employed by both sexes to demonstrate commitment and understanding. Empirical data indicates that relationships with a relatively large age gap, despite popular conception, can be just as long-lasting and happy as those with smaller ones.
Abuse and violence As a society becomes more urbanized, that is, as population density increases, incidents of internecine violence become more common. Within a household or a romantic relationship, men are much more likely to physically assault or even murder women than the other way around.
Pregnant women are even more likely to be beaten by their husbands or boyfriends.
Battery is in fact a leading cause of injuries for women. Cases of
domestic violence are often the result of (long-term) revenge, including
redirected aggression. Men who beat their wives or girlfriends were likely beaten as children. Battered women, in turns, may beat their own children. Despite the rising economic independence of women in modern countries, men's attitudes have not changed. Men who earn less than their wives or girlfriends are more inclined to verbally or physically abuse them, and such relationships are more likely to dissolve, though not necessarily among younger generations, who tend to hold more egalitarian views.
Individual differences Sociosexual Orientation Inventory Just as there are differences between the sexes in mating strategies, there are differences within the sexes and such within-sex variation is substantial. Individual differences in mating strategies are commonly measured using the Sociosexual Orientation Inventory (SOI), a questionnaire that includes items assessing past sexual behavior, anticipated future sexual behavior, and openness to casual sex. Higher scores on the SOI indicate a
sexually unrestricted mating strategy, which indicates an openness to casual sex and more partners. Conversely, lower scores on the SOI indicate a
sexually restricted mating strategy, which a focus on higher commitment and fewer partners. Several studies have found that scores on the SOI are related to mate preferences, with more sexually restricted individuals preferring personal/parenting qualities in a mate (e.g. responsibility and loyalty), and with less sexual restricted individual preferring qualities related to physical attractiveness and social visibility. Other studies have shown that SOI scores are related to personality traits (i.e.
extraversion,
erotophilia, and low
agreeableness),
conspicuous consumption in men as a means to attract women, and increased allocation of visual attention to attractive opposite-sex faces.
Short-term vs. long-term mating Evolutionary psychologists have proposed that individuals adopt conditional mating strategies in which they adjust their mating tactics to relevant environmental or internal conditions, which is called strategic pluralism. High mate value males have been shown to have sexual intercourse earlier and more often than low mate value males. Self-esteem and physical attractiveness have been shown to be related to male pursuing a short term mating strategy. Additionally, males with more testosterone have been shown to pursue more short-term strategies. However, not all males pursue a short-term mating strategy. There are several reasons for this. First, long-term mating has its own advantages that have already been discussed. Second, while males of higher mate value and status have opportunities to pursue short-term mates, low mate value males typically do not have the same opportunities. Since females generally prefer long-term mating strategies, the few who would mate in the short-term are already paired with the high mate value males. Additionally, the benefits of short-term mating for females are only obtained through high mate value males. Therefore, low status males are more likely to pursue long-term mating strategy.
Differences among females While more attractive males tend to pursue a short-term mating strategy, more attractive females tend to pursue a more long-term mating strategy. Additionally, younger females are more likely to pursue a short-term mating strategy, as well as those who are not satisfied with their current partner. The ovulatory cycle has been shown to influence a female's mating strategy. In the late follicular phase, women are the most fertile in the ovulatory cycle. During this time, there is evidence that females tend to pursue a short-term oriented mating strategy over a long-term one. Additionally, female sexual desires increase as well as their attraction towards more masculine males. In turn, this increase influences females to pursue a more long or short term oriented strategy depending on the mate value of their current partner.
Mating plasticity Research on the conditional nature of mating strategies has revealed that long-term and short-term mating preferences can be fairly plastic. Following exposure to cues that would have been affected mating in the ancestral past, both men and women appear to adjust their mating preferences in ways that would have historically enhanced their fitness. Such cues include the need to care for young, danger from animals and other humans, and resource availability. Additionally, there is evidence that the female sex drive is more plastic than male sex drive, because they are the selecting sex. Since females typically chose when and with whom to engage in sex, this sex drive plasticity could be an effect of female
mate choice.
Alternatives to opposite-sex pair-bonding Asexuality, aromanticism, and celibacy While the general lack of sexual attraction—
asexuality—has traditionally been viewed as a problem to be rectified, research since the 2010s has cast doubt upon this view. Research on how asexual individuals forge social relationships, including romantic ones, is ongoing. The Catholic Church has traditionally demanded a vow of
celibacy from nuns and priests. Nuns may be formally married to Jesus Christ by ritual and may engage in various nurturing activities as they would in an ordinary household. Priests, on the other hand, may not marry and must
abstain from sexual intercourse. However, many priests have left the Church in order to get married and many of those who remain fail to maintain their vows. Some have even been caught in scandals involving sexual misconduct, including pedophilia. In many jurisdictions today, a homosexual couple may choose to get
married, in which case they would receive the same benefits as their heterosexual counterparts, including social security, pensions, discounted membership fees, medical decision-making, among others. As sociologist Alice Evans explains, "Where men's honor depends on women's seclusion,
cross-gender friendships are rare." This is helpful for both males and females, as males obtain greater genetic diversity for their offspring and females have access to healthy males, which are typically lacking in high pathogen societies. Polygamy takes two forms,
polygyny (a husband having multiple wives) and
polyandry (a wife having multiple husbands). While polygyny can be found in many different societies, polyandry is much rarer. One polyandrous society is the
Toda people in Southern India. However, the co-husbands of a woman are always brothers. In such a union, all brothers have sexual access to their shared wife and the paternity of the children born is decided by ritual. A person having sex in isolation can avoid commitment, relationship troubles, as well as venereal diseases. Due to rising demand,
sex toys of a variety of shapes and sizes have become common in the Western world since the late twentieth century. Masturbation can be done with the aid of pornographic videos and magazines. Today, people may also have sexual intercourse with one another remotely
via the Internet. == Effects of modernity ==