Sexual violence refers to a range of completed or attempted sexual acts in which the affected party does not or is unable to consent.^[1][2] Theories on the causes of sexual violence are numerous and have come out of many different disciplines, such as women's studies, public health, and criminal justice.^[3] Proposed causes include military conquest, socioeconomics, anger, power, sadism, traits, ethical standards, laws, and evolutionary pressures. Most of the research on the causes of sexual violence has focused on male offenders.^[4]

Clinical psychologist^[5] Nicholas Groth has described several different types of rape.^[6] A detailed conceptual analysis shows that objectification might underlie denial of agency and personhood that leads to rape.^[7]

The goal of these rapists is to humiliate, debase and hurt their victims. They use an excessive amount of force, whether or not victims resist. Also, they express their contempt for their victims through physical violence and profane language. For these rapists, sex is a weapon to defile and degrade the victim, rape constitutes the ultimate expression of their anger. This rapist considers rape the ultimate offense they can commit against the victim. Friends and acquaintances of anger rapists may report a dark side to their personalities or lifestyles.^[8]

Anger rape is characterized by physical brutality: much more physical force is used during the assault than would be necessary if the intent were simply to overpower the victim and achieve penetration. This type of offender attacks their victim by grabbing, striking and knocking the victim to the ground, beating them, tearing their clothes, and raping them.

The experience for the offender is one of conscious anger and rage.^[6]

For these rapists, rape becomes a way to compensate for their underlying feelings of inadequacy and feeds their issues of mastery, control, dominance, strength, intimidation, authority and capability. The intent of the power rapist is to assert their competency. The power rapist relies upon verbal threats, intimidation with a weapon, and only uses the amount of force necessary to subdue the victims. Rapes committed by this perpetrator are more impulsive, spontaneous, and unplanned. Victims are frequently encountered by coincidence, such as at pubs, clubs, or parties. Their attack is characterized by a modest level of force applied over a brief period of time. Unlike the power reassurance rapist, the power assertive rapist sees himself as a "macho man" who wants to prove his virility to women. His language is abrasive and laced with profanities.^[9]

The power rapist often will assume that the assault was not an assault because of their rape supportive attitudes. Power rapists are often in a mind set that they are entitled to their own pleasure regardless of the victims feelings or lack of desire. In the article, "Sexual Perpetrators' Justifications for Their Actions", it says, "One perpetrator who forced his steady dating partner to have sex after she willingly touched his penis, said 'I felt as if I had gotten something that I was entitled to. And I felt like I was repaying her for sexually arousing me'."^[10]

There is a clear tendency for a rapist to have fantasies about sexual experiences and assume that they are enjoying it or grateful for it even when they resist.^[10] Because this is only a fantasy, the rapist does not feel reassured for long by either their own performance or the victim's response. The rapist feels that they must find another victim, convinced that this victim will be "the right one". Hence, their offenses may become repetitive and compulsive. They may commit a series of rapes over a short period of time.^[11]

These rapists have a sexual association with anger and power so that aggression and the infliction of pain itself are eroticized. For this rapist, sexual excitement is associated with the inflicting of pain upon their victim. The offender finds the intentional maltreatment of their victim intensely gratifying and takes pleasure in the victim's torment, pain, anguish, distress, helplessness, and suffering;^[12] they find the victim's struggling with them to be an erotic experience.

The sadistic rapist's assaults are deliberate, calculated, and preplanned. They will often wear a disguise or will blindfold their victims.^[12] Prostitutes or other people whom they perceive to be vulnerable are often the sadistic rapist's targets. The victims of a sadistic rapist may not survive the attack. For some offenders, the ultimate satisfaction is gained from murdering the victim.^[6]

The propensity approach to sexual aggression focuses on the traits (features that are stable and fixed over time) that can increase the probability that someone will commit an act of sexual violence.^[13]

The cognitive traits and attitudinal biases associated with a propensity to commit acts of sexual aggression come from socio-cultural research and says that forms of sexual aggression come from false beliefs of gender relations, misdirected objectives (i.e. only dating to have sex), and erroneous impressions of social interactions (linked to gender relations).^[14] Research focusing specifically on gender relations within the context of sexual assault have found that conformance to notions of male entitlement, suspicion of the opposite sex, perceiving violence as a reasonable method for solving problems, and holding the traditional patriarchal attitudes that specific societal roles belong to specific genders are found to adhere to the concept of male entitlement/superiority (in the context of gender relations).^[15] The cognitive biases that add to one's propensity to commit acts of sexual violence include a feeling of entitlement (entitlement to sex), and the beliefs that women are sex objects, men's sexual drive is uncontrollable, society is dangerous, and women are unpredictable and dangerous.^[16]

The neuropsychological deficits that may contribute to a propensity for sexual assault include difficulties in self-regulation, executive functioning problems, perception/memory system problems, arousal/motivation system deficits, and problems in the action selection system.^[17] The difficulties arise when sexual aggressors are not able to understand their emotional states so that when confronted with a situation that trigger their arousal/motivation systems, they become confused and may have issues controlling their behavior.^[18] An inability to adapt plans to deal with unforeseen situations or having limited problem-solving skills (the action selection system) and maintaining maladaptive beliefs categorized by erroneous interpretations of social encounters (perception/memory systems) can also contribute to a greater tendency to commit acts of sexual violence.^[19]

Research focusing on the deviant sexual preferences propensity model suggests that people who perpetrate acts of sexual violence are sexually aroused by non-consensual sexual interactions more than consensual sexual interactions. The research that seeks to support this model (penile plethysmography) has not been able to reliably find differences in the two different groups of males (those who have committed acts of sexual aggression and those who have not).^[20] Instead, the studies are providing more evidence for the cognitive, attitudinal, neuropsychological, and lifestyle differences that impact sexual arousal in certain situations, rather than a deviant sexual preference leading to a higher propensity for sexual violence.^[21][22]

The last propensity model of sexual violence views the perpetrators of sexual violence through three lenses of different personality traits, with interpersonal functioning being the most important factor in whether a person will have a higher propensity for sexual violence. This model is based on the idea that sexual aggression is indicative of problems starting and managing enjoyable intimate relationships.^[23]

The insecure attachment style lens stems from research done on sexual aggressors that characterized them as people who had insecure attachment styles (as a result of child abuse, parental divorce, etc.) manifested as low self-esteem, an inability to develop relationships with others, and significant emotional loneliness.^[24] Through the lens of this model, sexual aggression is used as a faulty means of fulfilling intimacy needs.

The antisocial personality lens stems from a study done by Hall and Hirschman (1991)^[25] and emphasizes the subsequent consequences of experiencing adversities/abuses in childhood, which can lead to the development of antisocial personality traits in adulthood. The antisocial personality traits combine with contextual, emotional (rage/anger), cognitive (irrational thoughts that influence emotions), and physiological (deviant sexual arousal) factors that increase the probability of committing sexual violence.^[23]

Lastly, the narcissistic lens emphasizes the assumption that individuals with narcissistic personality traits are more likely to interpret refusal of sexual advances as insults, and in turn will have an adverse reaction to such insults (narcissistic injury).^[23] This lens is best used when describing sexual violence that includes known victims (such as incest, date rape, domestic abuse, etc.) because it is not able to adequately explain sexual violence such as stranger rape.^[26]

Data on sexually violent individuals show that most direct their acts at individuals whom they already know.^[27][28]

Drug-facilitated sexual assault (DFSA), also known as predator rape, is a sexual assault carried out after the victim has become incapacitated due to having consumed alcoholic beverages or other drugs. Alcohol has been shown to play a disinhibiting role in certain types of sexual assault,^[29] as have some other drugs, notably cocaine.^[30] Alcohol has a psychopharmacological effect of reducing inhibitions, clouding judgements and impairing the ability to interpret cues.^[31] The biological links between alcohol and violence are, however, complex.^[29] Research on the social anthropology of alcohol consumption suggests that connections between violence, drinking and drunkenness are socially learned rather than universal.^[32] Some researchers have noted^[33] that alcohol may act as a cultural break time, providing the opportunity for antisocial behavior. Judgments are more likely to act violently when drunk because they do not consider that they will be held accountable for their behavior. Some forms of group sexual violence are also associated with drinking. In these settings, consuming alcohol is an act of group bonding, where inhibitions are collectively reduced and individual judgment ceded in favor of the group.

In 1994, Richard Felson and James Tedeschi coauthored the controversial book Aggression and Coercive Actions: A Social-Interactionist Perspective, which argues that rapists are motivated by sexual entitlement, rather than the aggressive desire to dominate the victim.^[34] Felson believes that rape is an aggressive form of sexual coercion and the goals of rape are sexual entitlement and gaining a sense of power. Meta-analyses indicate that convicted rapists demonstrate greater sexual arousal to scenes of sexual coercion involving force than do non-rapists.^[35] In one study, male rapists evaluated with penile plethysmography demonstrated more arousal to forced sex and less discrimination between forced and consensual sex than non-rapist control subjects, though both groups responded more strongly to consensual sex scenarios.^[36]

There has been considerable research in recent times on the role of cognitive variables among the set of factors that can lead to rape. A detailed conceptual analysis shows that objectification might underlie denial of agency and personhood that leads to rape.^[7] Sexually violent men have been shown to be more likely to consider victims responsible for the rape and less knowledgeable about the impact of rape on victims.^[37] Such men may misread cues given out by women in social situations and may lack the inhibitions that act to suppress associations between sex and aggression.^[37] They may have coercive sexual fantasies,^[38] and overall are more hostile towards women than men who are not sexually violent.^[39][40][41] In addition to these factors, sexually violent men are believed to differ from other men in terms of impulsivity and antisocial tendencies.^[42] They also tend to have an exaggerated sense of masculinity. Sexual violence is also associated with a preference for impersonal sexual relationships as opposed to emotional bonding^{[dubious – discuss]}, with having many sexual partners and with the inclination to assert personal interests at the expense of others.^[41][43] A further association is with adversarial attitudes on gender, which hold that women are opponents to be challenged and conquered.^[44]

The research on convicted rapists has found several important motivational factors in the sexual aggression of males. Those motivational factors repeatedly implicated are having anger at women and having the need to control or dominate them.^[45]

A study by Marshall et al. (2001) found that male rapists had less empathy toward women who had been sexually assaulted by an unknown assailant and more hostility toward women than non-sex-offenders and nonoffender males/females.^[46]

Meta-analyses indicate that convicted rapists demonstrate greater sexual arousal to scenes of sexual coercion involving force than do non-rapists.^[35]

Factors operating at a societal level that influence sexual violence include laws and national policies relating to gender equality in general and to sexual violence more specifically, as well as norms relating to the use of violence. While the various factors operate largely at local level, within families, schools, workplaces and communities, there are also influences from the laws and norms working at national and even international levels.

Lawlessness during wars and civil conflicts can create a culture of impunity towards human rights abuses of civilians. Some irregular armies and militias tacitly endorse looting of civilian areas as a way for troops to supplement their meagre incomes, and promote pillaging and rape of civilians as a reward for victory.^[47][48] In 2008, the United Nations Security Council argued that "women and girls are particularly targeted by the use of sexual violence, including as a tactic of war to humiliate, dominate, instil fear in, disperse and/or forcibly relocate civilian members of a community or ethnic group."^[49]

Refugees and internally displaced people who flee their homes during war and major disasters can experience human trafficking for sexual or labour exploitation due to the breakdown of economies and law and order.^[50] Speaking at the UN General Assembly in 2010, the UN Special Rapporteur on Violence Against Women, its Causes and Consequences noted women's particular vulnerability and increased risk of experiencing violence following disasters.^[51] Following the 2010 Haiti earthquake, large numbers of women and girls living in Internally Displaced Persons camps experienced sexual violence.^[52] The Inter-American Commission on Human Rights recognized the need for state actors to respond to gender-based violence committed by private actors, in response to a petition by Haitian groups and human rights lawyers calling on the Haitian government and international actors to take immediate measures—like increasing lighting, security, and access to medical care—to address sexual violence against women and girls in the IDP camps.^[53]

Poverty has been identified as a contributing factor to both the perpetration and victimization of sexual violence. Significant correlations have been found between sexual violence victimization and unmet physical needs, such as housing and food insecurity.^[54][55] Some development and policy scholars have also described the fiscal and social-emotional costs of sexual violence, such as medical expenses and mental health issues. These costs can increase a victim's risk of falling into poverty or make it more difficult to get out of it.^[56][57][58]

Several authors have argued that the relationship between poverty and perpetration of sexual violence is mediated through forms of crisis of masculine identity.^{[59][60][61][62][63]} For example, Philippe Bourgois wrote about how young men in East Harlem, New York felt pressured by models of successful masculinity and family structure passed down from their parents' and grandparents' generations, alongside modern-day ideals of manhood that emphasize material consumption. In this context, gang rape and sexual conquest are normalized, as men turn their aggression against women they can no longer control patriarchally or support economically.^[61]

National and international economic shifts have been correlated with changes in the rate of sexual violence regionally and globally. For example, the global trend towards free trade has been accompanied by an increase in the trafficking women and girls, including sex trafficking.^[64] Some development researchers have claimed that globalization has increased poverty and unemployment in a number of countries, thus increasing the likelihood of sex trafficking and other forms of sexual violence.^[65] Central America, the Caribbean, and parts of Africa have been cited as examples.^[66][67]

Women in various countries face serious risks if they report rape. These risks include being subjected to violence (including honor killings) by their families, being prosecuted for sex outside marriage, or being forced to marry their rapist.^[68][69][70] This creates a culture of impunity that allows rape to go unpunished. "Delegation clauses" used in many nursing home contracts have been blamed for effectively permitting the rape of residents.^[71]

Sexual violence committed by men is to a large extent rooted in ideologies of male sexual entitlement. How deeply entrenched in a community beliefs in male superiority and entitlement to sex are will greatly affect the likelihood of sexual violence taking place, as will the general tolerance in the community of sexual assault and the strength of sanctions, if any, against perpetrators.^[27][72][73] These belief systems grant women extremely few legitimate options to refuse sexual advances.^[62][74][75] Some men thus simply exclude the possibility that their sexual advances towards a woman might be rejected or that a woman has the right to make an autonomous decision about participating in sex. In some cultures women, as well as men, regard marriage as entailing the obligation on women to be sexually available virtually without limit,^[76][77] though sex may be culturally proscribed at certain times, such as after childbirth or during menstruation.^[78]

Societal norms around the use of violence as a means to achieve objectives have been strongly associated with the prevalence of rape. In societies with a machismo ideology - emphasizing dominance, physical strength and male honor - rape is more common.^[79] Countries with a culture of violence, or where violent conflict is taking place, experience an increase in almost all forms of violence, including sexual violence.^[79][80]

There is evidence to suggest that sexual violence is also a learned behavior in some adults, particularly in regard to child sexual abuse. Studies on sexually abused boys have shown that around one in five later molest children themselves.^[81]

Childhood environments that are physically violent, emotionally unsupportive and characterized by competition for scarce resources have been associated with sexual violence.^[42][82] Sexually aggressive behavior in young men, for instance, has been linked to witnessing family violence, and having emotionally distant and uncaring fathers.^[39] Men raised in families with strongly patriarchal structures are also more likely to become violent, to rape and use sexual coercion against women, as well as to abuse their intimate partners, than men raised in homes that are more egalitarian.^[42]

Another factor involving social relationships is a family's response that blames women without punishing men, concentrating instead on restoring lost family honor. Such a response creates an environment in which rape can occur with impunity.

While families will often try to protect female members from rape and may also put their daughters on contraception to prevent visible signs should it occur,^[83] there is rarely much social pressure to control young men or persuade them that coercing sex is wrong.^[where?] Instead, in some countries, there is frequently support for family members to do whatever is necessary, including murder, to alleviate the shame associated with a rape or other sexual transgression. In a review of all honor killings occurring in Jordan in 1995,^[84] researchers found that in over 60% of the cases, the victim died from multiple gunshot wounds, mostly at the hands of a brother. In cases where the victim was a single pregnant woman, the offender was either acquitted of murder or received a reduced sentence.

A feminist theory of male-female rape is summarized by Susan Brownmiller's statement: "rape is nothing more or less than a conscious process of intimidation by which all men keep all women in a state of fear".^[85] Some feminists assert that male domination of women in socio-political and economic domains is the ultimate cause of most rapes, and consider male-female rape to be a crime of power that has little or nothing to do with sex itself.^[86] However, a 1983 study comparing 14 indicators of male dominance and the incidence of rape in 26 American cities found no correlations, except one where greater male dominance actually decreased the incidence of rape.^[87] Social learning theory of rape is similar to the feminist theory and links cultural traditions such as imitation, sex-violence linkages, rape myths (e.g., "women secretly desire to be raped"), and desensitization to be the core causes of rape.

Rape culture is a term used within women's studies and feminism, describing a culture in which rape and other sexual violence (usually against women) are common and in which prevalent attitudes, norms, practices, and media condone, normalize, excuse, or encourage sexualized violence.

Within the paradigm, acts of sexism are commonly employed to validate and rationalize normative misogynistic practices; for instance, sexist jokes may be told to foster disrespect for women and an accompanying disregard for their well-being, which ultimately make their rape and abuse seem "acceptable". Examples of behaviors said to typify rape culture include victim blaming, trivializing prison rape, and sexual objectification.

Rape culture as a concept and social reality was explored in detail in the 1975 film Rape Culture, produced by Margaret Lazarus and Renner Wunderlich for Cambridge Documentary Films.

Studies of college-aged sexually active men and women show they often conceptualize men as sexual initiators and women as sexual gatekeepers.^[88][89][90]

It has been argued that sexual assault trials,^[91] as well as rape itself, may be influenced by cultural narratives of men as sexual instigators.^[92][93] Boys are brought up to be sexually aggressive, dominant and conquering, as a way of affirming their masculinity. Catharine MacKinnon argues that men rape "for reasons that they share in common even with those who don't, namely masculinity and their identification with masculine norms and in particular being the people who initiate sex and being the people who socially experience themselves as being affirmed by aggressive initiation of sexual interaction".^[94] According to Check and Malamuth (1983), men are taught to take the initiative and persist in sexual encounters, while women are supposed to set the limits.^[95] This classical sexual script is often popularized through television shows, popular films and pornography, which depict the man making a sexual advance and the woman initially resisting, but then finally positively responding by falling in love with him or experiencing orgasm (Cowen, Lee, Levy, and Snyder, 1988; Malamuth and Check, 1981; Smith, 1976; Waggett, 1989). The implied message is that men should persist beyond a woman's protest and women should say "no" even if they desire sex (Muehlenhard and McCoy, 1991). The more traditional the society, the closer the adherence to this sexual script.^[95] For this reason, many men do not believe that a woman means "no" when she says "no", and continue to pressure the woman, and ultimately coerce or force her into sex; consent often becomes confused with submission.^[96]

In many societies, men who do not act in a traditionally masculine way are ostracized by their peers and considered effeminate^[97] In studies, young males from Cambodia, Mexico, Peru and South Africa reported that they have participated in incidents where girls were coerced into sex (such as gang rapes) and that they did so as a way to prove their masculinity to their friends, or under peer pressure and fear that they would be rejected if they did not participate in the assault.^[98]

Some theorists charge that the acceptance of these sexual practices increase sexual violence against women, by reinforcing stereotypical views about women, who are seen as sex objects which can be used and abused by men, and by desensitizing men; this being one of the reasons why some theorists oppose the sex industry. They argue that pornography eroticizes the domination, humiliation, and coercion of women, and reinforces sexual and cultural attitudes that are complicit in rape and sexual harassment. The anti-pornography feminist, Andrea Dworkin, has famously argued this point in her controversial Pornography: Men Possessing Women (1981).

Males who under some circumstances used force may have had greater reproductive success in the ancestral environment than males who did not employ force.^[86] Sociobiological theories of rape are theories that explore to what degree, if any, evolutionary adaptations influence the psychology of rapists. Such theories are highly controversial, as traditional theories typically do not consider rape to be a behavioral adaptation. Some object to such theories on ethical, religious, political as well as scientific grounds. Others argue that a correct knowledge of the causes of rape is necessary in order to develop effective preventive measures. There is extensive research on sexual coercion.^[99]

• Factors associated with being a victim of sexual violence
• Types of rape
• Sexual violence
• Women's fear of crime

• Marnie E. Rice; Lalumiere, Martin L.; Vernon L. Quinsey (2005). The Causes Of Rape: Understanding Individual Differences In Male Propensity For Sexual Aggression (The Law and Public Policy.). American Psychological Association. ISBN 978-1-59147-186-8.

• Rape Crisis Information Pathfinder – Find journal articles, statistics and online resources on rape and sexual assault. Includes male survivor information
• Sexual Violence Facts from the National Center for Injury Prevention and Control