# Paraphilia

A paraphilia is an experience of recurring or intense sexual arousal to atypical objects, places, situations, fantasies, behaviors, or individuals. It has also been defined as a sexual interest in anything other than a legally consenting human partner. Paraphilias are contrasted with normophilic ("normal") sexual interests, although the definition of what makes a sexual interest normal or atypical remains controversial.
The exact number and taxonomy of paraphilia is under debate; Anil Aggrawal has listed as many as 549 types of paraphilias. Several sub-classifications of paraphilia have been proposed; some argue that a fully dimensional, spectrum, or complaint-oriented approach would better reflect the evident diversity of human sexuality. Although paraphilias were believed in the 20th century to be rare among the general population, recent research has indicated that paraphilic interests are relatively common.

## Etymology

Coinage of the term paraphilia (paraphilie) has been credited to Friedrich Salomon Krauss in 1903 and it was used with some regularity by Wilhelm Stekel in the 1920s. The term comes from the Greek παρά (para), meaning "other" or "outside of", and φιλία (-philia), meaning "loving". The word was popularized by John Money in the 1980s as a non-pejorative designation for unusual sexual interests. It was first included in the DSM in its 1980 edition.

## Definition

To date there is no broad scientific consensus for definitive boundaries between what are considered "unconventional sexual interests", kinks, fetishes, and paraphilias. As such, these terms are often used loosely and interchangeably, especially in common parlance.

### History of paraphilic terminology

Many terms have been used to describe atypical sexual interests, and there remains debate regarding technical accuracy and perceptions of stigma. Money described paraphilia as "a sexuoerotic embellishment of, or alternative to the official, ideological norm." Psychiatrist Glen Gabbard writes that despite efforts by Wilhelm Stekel and John Money, "the term paraphilia remains pejorative in most circumstances."
In the late 19th century, psychologists and psychiatrists started to categorize various paraphilias as they wanted a more descriptive system than the legal and religious constructs of sodomy, as well as perversion. In 1914, Albert Eulenburg observed a commonality across the paraphilias, using the terminology of his time writing, "All the forms of sexual perversion ... have one thing in common: their roots reach down into the matrix of natural and normal sex life; there they are somehow closely connected with the feelings and expressions of our physiological erotism. They are ... hyperbolic intensifications, distortions, monstrous fruits of certain partial and secondary expressions of this erotism which is considered 'normal' or at least within the limits of healthy sex feeling."
Before the introduction of the term paraphilia in the DSM-III (1980), the term sexual deviation was used to refer to paraphilias in the first two editions of the manual. In 1981, an article published in American Journal of Psychiatry described paraphilia as "recurrent, intense sexually arousing fantasies, sexual urges, or behaviors generally involving" the following:
* Non-human objects
* The suffering or humiliation of oneself or one's partner
* Prepubescent children
* Non-consenting persons

### Definition of typical versus atypical interests

Clinical literature contains reports of many paraphilias, only some of which receive their own entries in the diagnostic taxonomies of the American Psychiatric Association or the World Health Organization. There is disagreement regarding which sexual interests should be deemed paraphilic disorders versus normal variants of sexual interest. The DSM-IV-TR also acknowledges that the diagnosis and classification of paraphilias across cultures or religions "is complicated by the fact that what is considered deviant in one cultural setting may be more acceptable in another setting". Some argue that cultural relativism is important to consider when discussing paraphilias, because there is wide variance concerning what is sexually acceptable across cultures. Consensual adult activities and adult entertainment involving sexual roleplay, novel, superficial, or trivial aspects of sexual fetishism, or incorporating the use of sex toys are not necessarily paraphilic.

### Criticism of common definitions

There is scientific and political controversy regarding the continued inclusion of sex-related diagnoses such as the paraphilias in the DSM, due to the stigma of being classified as a mental illness. Some groups, seeking greater understanding and acceptance of sexual diversity, have lobbied for changes to the legal and medical status of unusual sexual interests and practices. Charles Allen Moser, a physician and advocate for sexual minorities, has argued that the diagnoses should be eliminated from diagnostic manuals. Ray Blanchard stated that the current definition of paraphilia in the DSM done by concatenation (i.e. by listing a set of paraphilias) and that defining the term by exclusion (anything that is not normophilic) is preferable.

### Inclusion and subsequent exclusion of homosexuality

Homosexuality, now widely accepted as a variant of human sexuality, was at one time discussed as a sexual deviation. Sigmund Freud and subsequent psychoanalytic thinkers considered homosexuality and paraphilias to result from psychosexual non-normative relations to the Oedipal complex, although not in the antecedent version of the 'Three Essays on Sexual Theory' where paraphilias are considered as stemming from an original polymorphous perversity. As such, the term sexual perversion or the epithet pervert have historically referred to gay men, as well as other non-heterosexuals (people who fall outside the perceived norms of sexual orientation).
By the mid-20th century, mental health practitioners began formalizing "deviant sexuality" classifications into categories. Originally coded as 000-x63, homosexuality was the top of the classification list (Code 302.0) until the American Psychiatric Association removed homosexuality from the DSM in 1973. Martin Kafka writes, "Sexual disorders once considered paraphilias (e.g., homosexuality) are now regarded as variants of normal sexuality."
A 2012 literature study by clinical psychologist James Cantor, when comparing homosexuality with paraphilias, found that both share "the features of onset and course (both homosexuality and paraphilia being life-long), but they appear to differ on sex ratio, fraternal birth order, handedness, IQ and cognitive profile, and neuroanatomy." The research then concluded that the data seemed to suggest paraphilias and homosexuality as two distinct categories but regarded the conclusion as "quite tentative" given the current limited understanding of paraphilias.

## Characteristics

Paraphilias typically arise in late adolescence or early adulthood. Persons with paraphilias are generally egosyntonic and view their paraphilias as something inherent in their being, although they recognize that their sexual fantasies lie outside the norm and may attempt to conceal them. Paraphilic interests are rarely exclusive and some people have more than one paraphilia. Some people with paraphilias may seek occupations and avocations that increase their access to objects of their sexual fantasies (e.g. voyeurs working in rental properties to "peep" on others or pedophiles working with Boy Scouts).
Research has found that some paraphilias, such as voyeurism and sadomasochism, are associated with more lifetime sexual partners, contradicting theories that paraphilias are associated with courtship disorders and arrested social development. Scientific literature includes some single-case studies of very rare and idiosyncratic paraphilias. These include an adolescent male who had a strong fetishistic interest in the exhaust pipes of cars, a young man with a similar interest in a specific type of car, and a man who had a paraphilic interest in sneezing (both his own and the sneezing of others).

### Causes and correlations

The causes of paraphilias in people are unclear, but some research points to a possible prenatal neurodevelopmental correlation. A 2008 study analyzing the sexual fantasies of 200 heterosexual men by using the Wilson Sex Fantasy Questionnaire exam determined that males with a pronounced degree of fetish interest had a greater number of older brothers, a high 2D:4D digit ratio (which would indicate excessive prenatal estrogen exposure), and an elevated probability of being left-handed, suggesting that disturbed hemispheric brain lateralization may play a role in paraphilic attractions. Behavioral explanations propose that paraphilias are conditioned early in life, during an experience that pairs the paraphilic stimulus with intense sexual arousal. Susan Nolen-Hoeksema suggests that, once established, masturbatory fantasies about the stimulus reinforce and broaden the paraphilic arousal.

## Prevalence

Although paraphilic interests in the general population were believed to be rare, research has shown that fantasies and behaviors related to voyeurism, sadomasochism and couple exhibitionism are not statistically uncommon among adults. In a study conducted in a population of men, 62% of participants reported at least one paraphilic interest. In another sample of college students, voyeurism was reported in 52% of men. The DSM-5 estimates that 2.2% of males and 1.3% of females in Australia engaged in bondage and discipline, sadomasochism, or dominance and submission within the past 12 months. The population prevalence of sexual masochism disorder is unknown.

### Among women

Paraphilias are rarely observed in women; however, there have been some studies on females with paraphilias. Men and women differ on the content of their sexual fantasies, with the former reporting greater proportions of fetishism, exhibitionism and sadism, and the latter reporting greater proportions of masochism. Sexual masochism has been found to be the most commonly observed paraphilia in women, with approximately 1 in 20 cases.

## In ancient cultures

Paraphilic fantasies and behaviors have been registered in multiple old and ancient sources. Voyeurism, bestiality, exhibitionism and necrophilia have been described in the Bible. Sexual relations with animals have also been depicted in cave paintings. Some ancient sex manuals such as the Kama Sutra (450), Koka Shastra (1150) and Ananga Ranga (1500) discuss biting, marks left after sex and love blows. Although evidence suggests that paraphilic behaviors have existed prior to the Renaissance, it is difficult to ascertain how common they were and how many people had persistent paraphilic fantasies in ancient times.
Bestiality has been depicted multiple times in Greek mythology, although the act itself usually involved a deity in zoomorphic form, such as Zeus seducing Europa, Leda and Persephone while disguised as a bull, a swan and a serpent, respectively. Zeus was also depicted, in the form of an eagle, abducting Ganymede, an act that alludes to both bestiality and pederastry. Some fragments of Hittite law include prohibitions of and permissions to engage in specific acts of bestiality.
Havelock Ellis pointed to an example of sexual masochism in the fifteenth century. The report, written by Giovanni Pico della Mirandola, described a man who could only be aroused by being beaten with a whip dipped in vinegar. Wilhelm Stekel also noted that Rousseau also discussed his own masochism in his Confessions. Other similar instances of persistent paraphilic fantasies were reported between 1516 and 1643 by Coelius Sedulius, Rhodiginus, Brundel and Meibomius.

## Diagnostic and Statistical Manual of Mental Disorders (DSM)
### DSM-I and DSM-II

In American psychiatry, prior to the publication of the DSM-I, paraphilias were classified as cases of "psychopathic personality with pathologic sexuality". The DSM-I (1952) included sexual deviation as a personality disorder of sociopathic subtype. The only diagnostic guidance was that sexual deviation should have been "reserved for deviant sexuality which [was] not symptomatic of more extensive syndromes, such as schizophrenic or obsessional reactions". The specifics of the disorder were to be provided by the clinician as a "supplementary term" to the sexual deviation diagnosis; there were no restrictions in the DSM-I on what this supplementary term could be. Researcher Anil Aggrawal writes that the now-obsolete DSM-I listed examples of supplementary terms for pathological behavior to include "homosexuality, transvestism, pedophilia, fetishism, and sexual sadism, including rape, sexual assault, mutilation."
The DSM-II (1968) continued to use the term sexual deviations, no longer ascribed them under personality disorders but rather alongside them in a broad category titled "personality disorders and certain other nonpsychotic mental disorders". The types of sexual deviations listed in the DSM-II were: sexual orientation disturbance (homosexuality), fetishism, pedophilia, transvestitism, exhibitionism, voyeurism, sadism, masochism, and "other sexual deviation". No definition or examples were provided for "other sexual deviation" but the general category of sexual deviation was meant to describe the sexual preference of individuals that was "directed primarily toward objects other than people of opposite sex, toward sexual acts not usually associated with coitus, or toward coitus performed under bizarre circumstances, as in necrophilia, pedophilia, sexual sadism, and fetishism." Except for the removal of homosexuality from the DSM-III onwards, this definition provided a general standard that has guided specific definitions of paraphilias in subsequent DSM editions, up to DSM-IV-TR.

### DSM-III through DSM-IV

The term paraphilia was introduced in the DSM-III (1980) as a subset of the new category of "psychosexual disorders". The DSM-III-R (1987) renamed the broad category to sexual disorders, renamed atypical paraphilia to paraphilia NOS (not otherwise specified), renamed transvestism as transvestic fetishism, added frotteurism, and moved zoophilia to the NOS category. It also provided seven nonexhaustive examples of NOS paraphilias, which besides zoophilia included exhibitionism, necrophilia, partialism, coprophilia, klismaphilia, and urophilia. The DSM-IV (1994) retained the sexual disorders classification for paraphilias, but added an even broader category, "sexual and gender identity disorders", which includes them. The DSM-IV retained the same types of paraphilias listed in DSM-III-R, including the NOS examples, but introduced some changes to the definitions of some specific types.

### DSM-IV-TR

The DSM-IV-TR describes paraphilias as "recurrent, intense sexually arousing fantasies, sexual urges or behaviors generally involving nonhuman objects, the suffering or humiliation of oneself or one's partner, or children or other nonconsenting persons that occur over a period of six months" (criterion A), which "cause clinically significant distress or impairment in social, occupational, or other important areas of functioning" (criterion B). DSM-IV-TR names eight specific paraphilic disorders (exhibitionism, fetishism, frotteurism, pedophilia, sexual masochism, sexual sadism, voyeurism, and transvestic fetishism, plus a residual category, paraphilia—not otherwise specified). Criterion B differs for exhibitionism, frotteurism, and pedophilia to include acting on these urges, and for sadism, acting on these urges with a nonconsenting person. Sexual arousal in association with objects that were designed for sexual purposes is not diagnosable. Some paraphilias may interfere with the capacity for sexual activity with consenting adult partners. In the current version of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR), a paraphilia is not diagnosable as a psychiatric disorder unless it causes distress to the individual or harm to others.

### DSM-5

The DSM-5 adds a distinction between paraphilias and "paraphilic disorders", stating that paraphilias do not require or justify psychiatric treatment in themselves, and defining paraphilic disorder as "a paraphilia that is currently causing distress or impairment to the individual or a paraphilia whose satisfaction has entailed personal harm, or risk of harm, to others". The DSM-5 Paraphilias Subworkgroup reached a "consensus that paraphilias are not ipso facto psychiatric disorders", and proposed "that the DSM-V make a distinction between paraphilias and paraphilic disorders. One would ascertain a paraphilia (according to the nature of the urges, fantasies, or behaviors) but diagnose a paraphilic disorder (on the basis of distress and impairment). In this conception, having a paraphilia would be a necessary but not a sufficient condition for having a paraphilic disorder." The 'Rationale' page of any paraphilia in the electronic DSM-5 draft continues: "This approach leaves intact the distinction between normative and non-normative sexual behavior, which could be important to researchers, but without automatically labeling non-normative sexual behavior as psychopathological. It also eliminates certain logical absurdities in the DSM-IV-TR. In that version, for example, a man cannot be classified as a transvestite—however much he cross-dresses and however sexually exciting that is to him—unless he is unhappy about this activity or impaired by it. This change in viewpoint would be reflected in the diagnostic criteria sets by the addition of the word 'Disorder' to all the paraphilias. Thus, Sexual Sadism would become Sexual Sadism Disorder; Sexual Masochism would become Sexual Masochism Disorder, and so on."
Bioethics professor Alice Dreger interpreted these changes as "a subtle way of saying sexual kinks are basically okay – so okay, the sub-work group doesn't actually bother to define paraphilia. But a paraphilic disorder is defined: that's when an atypical sexual interest causes distress or impairment to the individual or harm to others." Interviewed by Dreger, Ray Blanchard, the Chair of the Paraphilias Sub-Work Group, stated, "We tried to go as far as we could in depathologizing mild and harmless paraphilias, while recognizing that severe paraphilias that distress or impair people or cause them to do harm to others are validly regarded as disorders." Charles Allen Moser stated that this change is not really substantive, as the DSM-IV already acknowledged a difference between paraphilias and non-pathological but unusual sexual interests, a distinction that is virtually identical to what was being proposed for DSM-5, and it is a distinction that, in practice, has often been ignored. Linguist Andrew Clinton Hinderliter argued that "including some sexual interests—but not others—in the DSM creates a fundamental asymmetry and communicates a negative value judgment against the sexual interests included," and leaves the paraphilias in a situation similar to ego-dystonic homosexuality, which was removed from the DSM because it was no longer recognized as a mental disorder.
The DSM-5 has specific listings for eight paraphilic disorders. These are voyeuristic disorder, exhibitionistic disorder, frotteuristic disorder, sexual masochism disorder, sexual sadism disorder, pedophilic disorder, fetishistic disorder, and transvestic disorder. Other paraphilic disorders can be diagnosed under the Other Specified Paraphilic Disorder or Unspecified Paraphilic Disorder listings, if accompanied by distress or impairment.

## International Classification of Diseases
### ICD-6,  ICD-7,  ICD-8

In the ICD-6 (1948) and ICD-7 (1955), a category of "sexual deviation" was listed with "other Pathological personality disorders". In the ICD-8 (1965), "sexual deviations" were categorized as homosexuality, fetishism, pedophilia, transvestism, exhibitionism, voyeurism, sadism and masochism.

### ICD-9

In the ICD-9 (1975), the category of sexual deviations and disorders was expanded to include transsexualism, sexual dysfunctions, and psychosexual identity disorders. The list contained homosexuality, bestiality, pedophilia, transvestism, exhibitionism, transexualism, Disorders of psychosexual identity, frigidity and impotence, Other sexual deviations and disorders (including fetishism, masochism, and sadism).

### ICD-10

In the ICD-10 (1990), the category "sexual deviations and disorders" was divided into several subcategories. Paraphilias were placed in subcategory of "sexual preference disorders". The list included fetishism, fetishistic transvestism, exhibitionism, voyeurism, pedophilia, sadomasochism and other disorders of sexual preference (including frotteurism, necrophilia, and zoophilia). Homosexuality was removed from the list, but ego-dystonic sexual orientation was still considered a deviation which was placed in subcategory "psychological and behavioural disorders associated with sexual development and orientation".

### ICD-11

In the ICD-11 (2022), "paraphilia" has been replaced with "paraphilic disorder". Any paraphilia and any other arousal pattern by itself no longer constitutes a disorder. To date, the diagnosis must meet criteria of paraphilia and one of the following: 1) a marked distress associated with arousal pattern (but not one that comes from rejection or fear of rejection); 2) the person has acted on the arousal pattern towards unwilling others or others considered as unable to give consent; 3) a serious risk of injury or death. The list of the paraphilic disorders includes: Exhibitionistic Disorder, Voyeuristic Disorder, Pedophilic Disorder, Coercive Sexual Sadism Disorder, Frotteuristic Disorder, Other Paraphilic Disorder Involving Non-Consenting Individuals, and Other Paraphilic Disorder Involving Solitary Behaviour or Consenting Individuals. As of now, disorders associated with sexual orientation have been removed from the ICD. Gender issues have been removed from the mental health category and have been placed under "Conditions related to sexual health".

## Paraphilic disorders

Most clinicians and researchers believe that paraphilic sexual interests cannot be altered, although evidence is needed to support this. Instead, the goal of therapy is normally to reduce the person's discomfort with their paraphilia and limit the risk of any harmful, anti-social, or criminal behavior. Both psychotherapeutic and pharmacological methods are available to these ends. Cognitive behavioral therapy, at times, can help people with extreme paraphilic disorders develop strategies to avoid acting on their interests. Patients are taught to identify and cope with factors that make acting on their interests more likely, such as stress. It is currently the only form of psychotherapy for paraphilic disorders supported by randomized double-blind trials, as opposed to case studies and consensus of expert opinion.

### Medications

Pharmacological treatments can help people control their sexual behaviors, but do not change the content of the paraphilia. They are typically combined with cognitive behavioral therapy for best effect.

#### SSRIs

Selective serotonin reuptake inhibitors (SSRIs) have been well received and are considered an important pharmacological treatment of severe paraphilic disorders. They are proposed to work by reducing sexual arousal, compulsivity, and depressive symptoms. They have been used with exhibitionists, non-offending pedophiles, and compulsive masturbators.

#### Antiandrogens

Antiandrogens are used in more extreme cases. Similar to physical castration, they work by reducing androgen levels, and have thus been described as chemical castration. The antiandrogen cyproterone acetate has been shown to substantially reduce sexual fantasies and offending behaviors. Medroxyprogesterone acetate and gonadotropin-releasing hormone agonists (such as leuprorelin) have also been used to lower sex drive. Due to the side effects, the World Federation of Societies of Biological Psychiatry recommends that hormonal treatments only be used when there is a serious risk of sexual violence, or when other methods have failed. Surgical castration has largely been abandoned because these pharmacological alternatives are similarly effective and less invasive.

### Legality

In the United States, since 1990 a significant number of states have passed sexually violent predator laws. Following a series of landmark cases in the Supreme Court of the United States, persons diagnosed with extreme paraphilic disorders, particularly pedophilia (Kansas v. Hendricks, 1997) and others that cause serious difficulty controlling behavior (Kansas v. Crane, 2002), can be held indefinitely in civil confinement under various state legislation generically known as sexually violent predator laws and the federal Adam Walsh Act (United States v. Comstock, 2010).