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.
Hebephilia is the strong, persistent sexual interest by adults in pubescent children who are in early adolescence, typically ages 11–14 and showing Tanner stages 2 to 3 of physical development. It differs from pedophilia, and from ephebophilia. While individuals with a sexual preference for adults may have some sexual interest in pubescent-aged individuals, researchers and clinical diagnoses have proposed that hebephilia is characterized by a sexual preference for pubescent rather than adult partners.
Kurt Freund was a Czech-Canadian physician and sexologist best known for developing the penile plethysmograph, research studies in pedophilia, and for the "courtship disorder" hypothesis as a taxonomy of certain paraphilias. After unsuccessful attempts to change men's sexual orientation, he advocated against conversion therapy and in favor of the decriminalization of homosexuality.
Penile plethysmography (PPG) or phallometry is a measurement of blood flow to the penis, typically used as a proxy for measurement of sexual arousal. The most commonly reported methods of conducting penile plethysmography involves the measurement of the circumference of the penis with a mercury-in-rubber or electromechanical strain gauge, or the volume of the penis with an airtight cylinder and inflatable cuff at the base of the penis. Corpora cavernosa nerve penile plethysmographs measure changes in response to inter-operative electric stimulation during surgery. The volumetric procedure was invented by Kurt Freund and is considered to be particularly sensitive at low arousal levels. The easier to use circumferential measures are more widely used, however, and more common in studies using erotic film stimuli. A corresponding device in women is the vaginal photoplethysmograph.
Chronophilia are forms of romantic preferences and/or sexual attractions limited to individuals of particular age ranges. Some such attractions, specifically those towards prepubescents and those towards the elderly, constitute types of paraphilia. The term was coined by John Money and has not been widely adopted by sexologists, who instead use terms that refer to the specific age range in question. An arguable historical precursor was Richard von Krafft-Ebing's concept of "age fetishism". Importantly, chronophilia are technically not determined by age itself, but by human sexual maturity stages, such as body type, secondary sexual characteristics and other visible features, particularly as measured by the stages of the Tanner scale.
Fraternal birth order, also known as the older brother effect, has been correlated with male sexual orientation, with a significant volume of research finding that the more older brothers a male has from the same mother, the greater the probability he will have a homosexual orientation. Ray Blanchard and Anthony Bogaert first identified the association in the 1990s and named it the fraternal birth order effect. Scientists have attributed the effect to a prenatal biological mechanism, since the association is only present in men with older biological brothers, and not present among men with older step-brothers and adoptive brothers. The mechanism is thought to be a maternal immune response to male fetuses, whereby antibodies neutralize male Y-proteins thought to play a role in sexual differentiation during development. This would leave some regions of the brain associated with sexual orientation in the 'female typical' arrangement – or attracted to men. Biochemical evidence for this hypothesis was identified in 2017, finding mothers with a gay son, particularly those with older brothers, had heightened levels of antibodies to the NLGN4Y Y-protein than mothers with heterosexual sons.
Ray Milton Blanchard III is an American-Canadian sexologist who researches pedophilia, sexual orientation and gender identity. He has found that men with more older brothers are more likely to be gay than men with fewer older brothers, a phenomenon he attributes to the reaction of the mother's immune system to male fetuses. Blanchard has also published research studies on phallometry and several paraphilias, including autoerotic asphyxia. Blanchard also proposed a typology of transsexualism.
The American-Canadian sexologist Ray Blanchard proposed a psychological typology of gender dysphoria, transsexualism, and fetishistic transvestism in a series of academic papers through the 1980s and 1990s. Building on the work of earlier researchers, including his colleague Kurt Freund, Blanchard categorized trans women into two groups: homosexual transsexuals who are attracted exclusively to men and are feminine in both behavior and appearance; and autogynephilic transsexuals who experience sexual arousal at the idea of having a female body. Blanchard and his supporters argue that the typology explains differences between the two groups in childhood gender nonconformity, sexual orientation, history of sexual fetishism, and age of transition.
Pedophilia is a psychiatric disorder in which an adult or older adolescent experiences a primary or exclusive sexual attraction to prepubescent children. Although girls typically begin the process of puberty at age 10 or 11, and boys at age 11 or 12, psychiatric diagnostic criteria for pedophilia extend the cut-off point for prepubescence to age 13. People with the disorder are often referred to as pedophiles.
Anti-pedophile activism encompasses social actions against pedophiles. It also includes acts of anti-pedophile citizen vigilantism conducted by vigilante groups, some of which have operated alongside government agencies in countries such as the United States, Canada and the United Kingdom.
James M. Cantor is an American-Canadian clinical psychologist and sexologist specializing in hypersexuality and paraphilias.
Sexual arousal describes the physiological and psychological responses in preparation for sexual intercourse or when exposed to sexual stimuli. A number of physiological responses occur in the body and mind as preparation for sexual intercourse, and continue during intercourse. Male arousal will lead to an erection, and in female arousal, the body's response is engorged sexual tissues such as nipples, clitoris, vaginal walls, and vaginal lubrication.
Erotic target location error (ETLE) is a hypothesized dimension for paraphilias, defined by having a sexual preference or strong sexual interest in features that are somewhere other than on one's sexual partners. When one's sexual arousal is based on imagining oneself in another physical form the erotic target is said to be one's self, or erotic target identity inversion (ETII).
Michael Chikong Seto is a Canadian forensic psychologist, sexologist, and author. He is director of Forensic Rehabilitation Research at the Royal Ottawa Health Care Group, where his research focuses on pedophilia, sexual offenses committed against children, child pornography, risk assessment, offenders with mental disorders, psychopathy, and program evaluation.
Sexual sadism disorder is the condition of experiencing great sexual arousal in response to the involuntary extreme pain, suffering or humiliation of other people. Several other terms have been used to describe the condition, and it may overlap with other conditions that involve inflicting pain. It is distinct from situations in which consenting individuals use mild or simulated pain or humiliation for sexual excitement. The words sadism and sadist are derived from the French writer and libertine Marquis de Sade, who wrote several novels depicting sexualized torture and violence.
Sexual concordance refers to the degree of correlation between subjective sexual arousal and physiological genital response. This phenomenon is often studied within the fields of sexology and psychology to understand the complex relationship between the mind and body during sexual activity.
Homosexuality was classified as a mental disorder in the Diagnostic and Statistical Manual of Mental Disorders (DSM) beginning with the first edition, published in 1952 by the American Psychiatric Association (APA). This classification was challenged by gay rights activists during the gay liberation following the 1969 Stonewall riots, and in December 1973, the APA board of trustees voted to declassify homosexuality as a mental disorder. In 1974, the DSM was updated and homosexuality was replaced with a new diagnostic code for individuals distressed by their homosexuality, termed ego-dystonic sexual orientation. Distress over one's sexual orientation remained in the manual, under different names, until the DSM-5 in 2013.
John Paul Fedoroff was a Canadian forensic psychiatrist, sexologist, and researcher who specialized in treating individuals with certain problematic paraphilias and/or individuals with developmental delay. He was the first director of the Sexual Behaviours Clinic (SBC) at the Institute of Mental Health Research at the Royal Ottawa Mental Health Centre located in Ottawa, Ontario. He was a full professor of forensic psychiatry, criminology, and law at the University of Ottawa.
A Long, Dark Shadow: Minor-Attracted People and Their Pursuit of Dignity is a book by Allyn Walker, then Assistant Professor of Sociology and Criminal Justice at Old Dominion University. The book’s first edition was published by the University of California Press in June 2021 as Walker's doctoral research. In the book, Walker conducted interviews with a total of 42 pedophiles who claimed to have never physically acted upon their sexual urges toward minors, although some did admit to consuming child pornography. These participants were sourced from the online forums B4U-ACT and Virtuous Pedophiles. Walker's primary emphasis lies in policy development and distinguishing between individuals with pedophilic tendencies who have not engaged in harmful behaviors as opposed to those classified as sex offenders.
