Sexual Arousal Patterns Research Articles

Gender Dysphoria and Sexual Euphoria: A Bayesian Perspective on the Influence of Gender-Affirming Hormone Therapy on Sexual Arousal

Self-reported sexual orientation of transgender individuals occasionally changes over transition. Using functional magnetic resonance imaging, we tested the hypothesis that neural and behavioral patterns of sexual arousal in transgender individuals would shift from the assigned to the experienced gender (e.g., trans women’s responses becoming more dissimilar to those of cis men and more similar to those of cis women). To this aim, trans women (N = 12) and trans men (N = 20) as well as cisgender women (N = 24) and cisgender men (N = 14) rated visual stimuli showing male–female, female–female or male–male intercourse for sexual arousal before and after four months of gender-affirming hormone therapy. A Bayesian framework allowed us to incorporate previous behavioral findings. The hypothesized changes could indeed be observed in the behavioral responses with the strongest results for trans men and female–female scenes. Activation of the ventral striatum supported our hypothesis only for female–female scenes in trans women. The respective application or depletion of androgens in trans men and trans women might partly explain this observation. The prominent role of female–female stimuli might be based on the differential responses they elicit in cis women and men or, in theory, the controversial concept of autogynephilia. We show that correlates of sexual arousal in transgender individuals might change in the direction of the experienced gender. Future investigations should elucidate the mechanistic role of sex hormones and the cause of the differential neural and behavioral findings.The study was registered at ClinicalTrials.gov (NCT02715232), March 22, 2016.

The landscape of human sexuality – modelling distances among various "normophilic" and paraphilic sexual arousal patterns in an online representative sample of men and women.

The landscape of human sexuality – modelling distances among various "normophilic" and paraphilic sexual arousal patterns in an online representative sample of men and women.

Patterns of Genital and Subjective Sexual Arousal in Cisgender Asexual Men

ABSTRACT Human asexuality has been defined as a lack of sexual attraction to others, although its nature is not well understood. Asexual men’s genital and subjective sexual arousal patterns were compared to sexual men’s to better understand asexual men’s sexual response patterns. Using a penile plethysmograph to measure genital arousal, 20 asexual, 27 heterosexual, and 22 gay cisgender men (M age = 28.28, SD = 9.41) viewed erotic films depicting sexual activity or masturbation, and a subsample engaged in sexual fantasy of their choosing. Questionnaires assessing sexual function and behavior were also completed. Asexual men scored lower on sexual desire and orgasmic function, higher on sexual aversion, and did not differ on overall sexual satisfaction. Compared with gay and heterosexual men, asexual men demonstrated lower genital and subjective sexual arousal to the erotic films but displayed similar sexual arousal when engaging in sexual fantasy. Asexual men’s lower levels of sexual excitation rather than their higher levels of sexual inhibition were associated with lower responses to the erotic films. These findings suggest asexual men have preferred sexual stimuli that differ from sexual men and have a similar capacity for sexual arousal as sexual men. Collectively these findings add to a growing literature aiming to understand the nature of asexuality.

A Case Report of Zoophilia in Aceh Where Lack of Education and Family Supervision can be a Trigger

BACKGROUND: Paraphilia or deviance is sexual stimulation or action that deviates from normal sexual behavior, but is necessary for some people to experience arousal and orgasm. People with paraphilia have unusual sexual interests, including inanimate objects, places, or individuals (children and corpses), and animals. Another paraphilic disorder involving a disapproving individual is characterized by a persistent and intense pattern of atypical sexual arousal manifested by sexual thoughts, fantasies, compulsions, or behavior in which the focus of the arousal pattern involves the other person being unwilling or unable to consent. However, it is not specifically described in any of the other so-called Paraphilic Disorder categories (e.g., arousal patterns involving corpses or animals). CASE REPORT: Here, we report a case of a male patient aged 37 years, unmarried status, his last education graduated from elementary school, the patient complained that he had frequent contact with cows, he had been experiencing it for 2 years, he felt lonely and had no close friends. As a child, he was often scolded and beaten by his father. He is also often teased by his friends. CONCLUSION: Zoophilia is another paraphilic disorder involving disapproving individuals characterized by a persistent and intense pattern of atypical sexual arousal manifested by sexual thoughts, fantasies, drives, or behaviors in which the focus of the arousal pattern involves the animal. This case is rarely reported because sufferers think their actions are not harmful, lack of parental attention and supervision may be one of the causes of this disorder.

Gender-specific genital and subjective sexual arousal to prepotent sexual stimuli in androphilic men and gynephilic women

Marked differences have been found in men’s and women’s sexual response patterns, contingent upon their sexual orientation; androphilic (attracted to men) and gynephilic (attracted to women) men demonstrate greatest genital and self-reported arousal to their preferred stimulus type (a “gender-specific” response), whereas androphilic women do not, and findings for gynephilic women have been mixed. While there have been many investigations into gynephilic men’s and androphilic women’s (i.e., heterosexual men/women) sexual response, there has been less investigation into the specificity of sexual response of androphilic men and gynephilic women. Given the complex nature of sexual stimuli that are used in sexual response research, it is often unclear to what extent contextual cues (e.g., cues other than the sexual actor’s primary and secondary sex characteristics, such as physical attractiveness, sexual activity, etc.) influence participants’ sexual response patterns. As such, the current study examined genital, discrete self-reported, and continuous self-reported responses of androphilic men ( n = 22) and gynephilic women ( n = 10) to prepotent sexual features (stimuli thought to elicit automatic sexual arousal: erect penises and exposed vulvas), non-prepotent sexual features (flaccid penises and pubic triangles) and neutral stimuli (clothed men and women). Both samples exhibited a gender-specific pattern of genital, self-reported, and continuous self-reported sexual arousal. Similarly, all measures of sexual arousal were generally found to be greatest to “prepotent” sexual cues. Implications for understanding gender specificity of sexual response are discussed.

Racial preferences in sexual attraction among White heterosexual and gay men: Evidence from sexual arousal patterns and negative racial attitudes.

Racial preferences in sexual attraction are highly visible and controversial. They may also negatively impact those who are excluded. It is unclear whether these preferences are merely self-attributed or extend to patterns of experienced sexual arousal. Furthermore, some argue that racial preferences in sexual attraction reflect idiosyncratic personal preferences, while others argue that they are more systematically motivated and reflect broader negative attitudes toward particular races. In two studies, we examined these issues by measuring the sexual arousal patterns and negative racial attitudes of 78 White men in relation to their racial preferences in sexual attraction to White versus Black people. For both White heterosexual men (n=40; Study 1) and White gay men (n=38; Study 2), greater racial preferences in sexual attraction to White versus Black people of their preferred gender were associated with more subjective and genital arousal by erotic stimuli featuring White versus Black people of their preferred gender, and with more explicit and implicit negative attitudes toward Black people. Findings suggest that racial preferences in sexual attraction are reflected in patterns of sexual arousal, and they might also be systematically motivated by negative attitudes toward particular races.

Patterns of Genital Sexual Arousal in Transgender Men

Most men show genital sexual arousal to one preferred gender. Most women show genital arousal to both genders, regardless of their sexual preferences. There is limited knowledge of whether this difference is driven by biological sex or gender identity. Transgender individuals, whose birth sex and gender identity are incongruent, provide a unique opportunity to address this question. We tested whether the genital responses of 25 (female-to-male) transgender men followed their female birth sex or male gender identity. Depending on their surgical status, arousal was assessed with penile gauges or vaginal plethysmographs. Transgender men’s sexual arousal showed both male-typical and female-typical patterns. Across measures, they responded more strongly to their preferred gender than to the other gender, similar to (but not entirely like) 145 cisgender (nontransgender) men. However, they still responded to both genders, similar to 178 cisgender women. In birth-assigned women, both gender identity and biological sex may influence sexual-arousal patterns.

Sex Differences in Sexual Arousal and Finger Length Ratio

ABSTRACT Most men show sexual arousal to one, preferred sex, whereas most women respond to both sexes, regardless of their sexual orientation. A different research program indicates that men have lower second-to-fourth finger length ratios (2D:4D) than women, possibly because men are exposed to higher levels of androgens during prenatal development. We hypothesized that sex differences in sexual arousal patterns are influenced by prenatal androgen exposure and would thus be explained by sex differences in 2D:4D. We measured the sexual response patterns of 139 men and 179 women via genital arousal and pupil dilation to erotic videos, in addition to their 2D:4D. Compared to women, men showed stronger responses to one sex over the other, although this pattern was clearer in genital arousal than pupil dilation. Men also had lower 2D:4D than women. However, there was no evidence that sex differences in sexual arousal related to sex differences in 2D:4D. Thus, whichever factor explains sex differences in sexual arousal patterns may not be reflected in 2D:4D.

Sexual Arousal Patterns of Mostly Heterosexual Men.

Mostly heterosexual men describe themselves as slightly bisexual, with predominant sexual attraction to women but occasional attraction to men. After "completely heterosexual," "mostly heterosexual" is the most common male sexual orientation, by self-report. However, self-reported bisexual feelings among men can diverge from patterns of genital arousal, an objective measure of sexual interest with high validity. We compared 49 mostly heterosexual and 50 completely heterosexual men's patterns of genital and subjective sexual arousal to male and female erotic stimuli. In addition, we compared these groups on relevant self-report measures pertaining to sexual feelings, identity, and behavior. Results supported increased bisexual arousal with respect to self-report and genital arousal pattern among the mostly heterosexual men, compared with the completely heterosexual men. Furthermore, mostly heterosexual men reported more childhood gender nonconformity, greater male sex partners, and less self-reported disgust or aversion to sex acts with men. "Mostly heterosexual" appears to be a gradation of male sexual orientation associated with unique genital arousal patterns, among other correlates.

Twins Reared Apart: Zygotic Division After Artificial Insemination/Twin Research Reviews: Selective Resuscitation of Premature Twins; Scientist Jailed for Editing Twins' Genes; Sexual Arousal Patterns in MZ Twins Discordant for Sexual Orientation; MZ Twins With Jejuno-Ileal Atresia/Media Reports: Twin Girls' Search for a Bone Marrow Donor; Puppy with a Possible Parasitic Twin; Twins in Silicon Valley; Surgical Separation of Craniopagus Twins;

This article opens with the brief life histories of reared-apart monozygotic (MZ) male twins. A New York City program that helped childless couples conceive via artificial insemination from the 1930s to the 1950s is examined as it related to these twins. The frequency with which pregnancies following assisted reproductive technology resulted in MZ twin pairs is also provided. Next, summaries of twin research concerning selective resuscitation, gene editing, sexual arousal and jejuno-ileal atresia are presented. The article ends with media reports of twin girls' efforts to find a bone marrow donor for their father, possible parasitic twinning in a puppy, identical female twins' business venture, the surgical separation of craniopagus twins, a twin-themed magazine cartoon and tragic events involving identical male twins.

Challenging the Standard Model of Sexual Response: Evidence of a Variable Male Sexual Response Cycle

ABSTRACT Historically the male sexual response cycle was seen as uniform and used as the standard for women. Recent research has suggested that men’s sexual response cycle may vary more than previously thought. We asked 520 sexually active men between the ages of 18–73 to report on their sexual desire and arousal patterns during their last sexual experience. Using a latent class mixture model from retrospective sexual response data, we found five classes of desire and arousal patterns. These patterns were examined for associations with demographics, outcomes during the sexual experience, and outcomes for the global relationship. The experiences of arousal and desire appear to be indistinguishable for men in this sample. The Fluctuation sexual response class (19% of men) and the High sexual response class (40%) were significantly different from most of the other classes in duration of their sexual experiences and overall satisfaction with their sexual experiences. Still, most sexual response patterns were associated with healthy relational and sexual outcomes. Variability in the male sexual response cycle is important to acknowledge and normalize.

Forensic Implications of the New Classification of ICD-11 Paraphilic Disorders in Brazil

IntroductionThe World Health Organization (WHO) Department of Mental Health and Substance Abuse appointed a Working Group on Sexual Disorders and Sexual Health in order to revise and propose changes to ICD-10 categories. AimAnalyze ethical and legal implications in Brazil of the proposed ICD-11 diagnostic criteria for paraphilic disorders. MethodsA forensic working group of Brazilian experts in collaboration with representatives of WHO reviewed the proposed modifications to the classification of Disorders of Sexual Preference in ICD-10 (F65), which is recommended to be replaced by Paraphilic Disorders in ICD-11. Proposals were reviewed through a medicolegal lens, using a legal and policy analysis guide put forth by WHO. The premise of this review was to understand that, although the ICD classification is intended to provide a basis for clinical and statistical health interventions, medical diagnostics may also be entangled in the complex legal, normative, and political environment of various countries. Main Outcome MeasureThe most important proposed change to this section is to limit the concept of paraphilic disorders primarily to patterns of sexual arousal involving a focus on others who are unwilling or unable to consent, but this change has not affected the ethical and legal aspects of psychiatric functioning in the Brazil. ResultsBecause Brazilian criminal law is directed toward criminal behavior and not to specific psychiatric diagnoses, the changes proposed for ICD-11 are not expected to create obstacles to health services or to modify criminal sentencing. Clinical ImplicationsAlthough ICD-11 has a number of changes in its content, there are no significant clinical implications in the Brazilian context, but a better clarity of conceptual definitions and diagnostic criteria. Strengths & LimitationsThe study is conducted with people from different Brazilian states, which is important for a comprehensive view. On the other hand, considering that it is a very heterogeneous country, there is the limitation that an even wider scope of the study is not possible. ConclusionIn the Brazilian context, the new guidelines for paraphilic disorders contribute to clinical utility and are not expected to create difficulties related to the legal, social, and economic consequences of sexual offenses in the country.Abdalla-Filho E, de Jesus Mari J, Diehl A, et al. Forensic Implications of the New Classification of ICD-11 Paraphilic Disorders in Brazil. J Sex Med 2019; 16:1814–1819.

Legal and Policy Implications in Mexico of Changes in ICD-11 Paraphilic Disorders

IntroductionThe World Health Organization (WHO) has made substantial changes to the classification of paraphilic disorders for the Eleventh Revision of the International Classification of Diseases and Related Health Problems (ICD-11), recently approved by the World Health Assembly. The most important is to limit paraphilic disorders primarily to persistent and intense patterns of atypical sexual arousal involving non-consenting individuals, manifested through persistent sexual thoughts, fantasies, urges, or behaviors, that have resulted in action or significant distress. AimTo analyze the legal, regulatory, and policy implications of the changes in the ICD-11 classification of paraphilic disorders for forensic practice, health systems, adjudication of sex offenders, and the provision of treatment in Mexico. MethodsAn expert Mexican advisory group was appointed to conduct this evaluation following an assessment guide provided by the WHO. Main Outcome MeasuresThe WHO assessment guide covered (i) laws related to sexual behaviors; (ii) the relationship between legal and clinical issues for non-forensic health professionals; (iii) implications of mental disorder classification for forensic practice; (iv) other implications of ICD-11 paraphilic disorders proposals; and (v) contextual issues. ResultsA variety of factors in Mexico make it highly unlikely that appropriate, evidence-based treatments for paraphilic disorders will be provided to those who need them, even if they seek treatment voluntarily and have not committed a crime. Mexican law focuses on the punishment of specific sexual behaviors rather than on underlying disorders. A paraphilic disorder would not be considered sufficient grounds for exemption from criminal responsibility. The application and scope of mental health evaluations in Mexican legal proceedings are quite limited, and individuals who commit sexual crimes almost never undergo forensic evaluations to establish the presence of paraphilic disorders. Psychiatric services may be mandated for sex offenders in highly specific circumstances but cannot exceed the duration of the criminal sentence. Clinical ImplicationsEvaluation and treatment guidelines should be developed based on international evidence and standards and promulgated for use with individuals with paraphilic disorders in forensic and non-forensic poopulations. The much greater specificity and operationalization of the ICD-11 guidelines as compared with the ICD-10 guidelines provide a better basis for identification and case formulation. Strengths & LimitationsMajor strengths of this analyses were that it was conducted to facilitate international comparability across several participating countries and the fact that it was conducted by a diverse multidisciplinary group representing various relevant legal, forensic and and clinical sectors. A limitation was that it was only possible to examine relevant federal laws and those of Mexico City rather than those of all 32 Mexican states. ConclusionThe descriptions of paraphilic disorders in the ICD-11 could support substantial improvements in the treatment of individuals with paraphilic disorders and the adjudication of sex offenders in Mexico, but specific changes in Mexican law would be required.Martínez-López JNI, Robles R, Fresán A, et al. Legal and Policy Implications in Mexico of Changes in ICD-11 Paraphilic Disorders. J Sex Med 2019;16:1623–1637.

Neural Responses to Sexual Stimuli in Heterosexual and Homosexual Men and Women: Men's Responses Are More Specific.

Patterns of genital arousal in response to gendered sexual stimuli (i.e., sexual stimuli presenting members of only one sex at a time) are more predictive of men's than of women's sexual orientations. Additional lines of evidence may shed light on the nature of these differences. We measured neural activation in homosexual and heterosexual men and women using fMRI while they viewed three kinds of gendered sexual stimuli: pictures of nude individuals, pictures of same-sex couples interacting, and videos of individuals self-stimulating. The primary neural region of interest was the ventral striatum (VS), an area of central importance for reward processing. For all three kinds of stimuli and for both VS activation and self-report, men's responses were more closely related to their sexual orientations compared with women's. Furthermore, men showed a much greater tendency to respond more positively to stimuli featuring one sex than to stimuli featuring the other sex, leading to higher correlations among men's responses as well as higher correlations between men's responses and their sexual orientations. Whole-brain analyses identified several other regions showing a similar pattern to the VS, and none showed an opposite pattern. Because fMRI is measured identically in men and women, our results provide the most direct evidence to date that men's sexual arousal patterns are more gender specific than women's.

The impact of homonegativity on gynephilic men's visual attention toward non-preferred sexual targets

Consistent with men's gender-specific patterns of sexual arousal, men tend to look longer at their preferred gender when viewing mixed-sex sexual stimuli. But gynephilic men do attend to males featured in sexual stimuli, and individual differences in negative affect may explain some variability in their sustained attention toward male targets. We explored the influence of homonegativity and affective reactions on visual attention toward sexual stimuli and subsequent feelings of sexual attraction. We sampled gynephilic men in two eye-tracking studies (Study 1: n = 49, Study 2: n = 38) that included measures of universalizing homonegativity, minoritizing homonegativity, and disgust to predict sustained visual attention and reported sexual attraction toward non-preferred targets in still-image and dynamic-video sexual stimuli. Greater feelings of universalizing homonegativity predicted less sustained attention toward solo non-preferred sexual targets. In dynamic stimuli depicting two non-preferred targets engaged in sexual intercourse, greater universalizing homonegativity predicted less sustained attention toward targets in the receptive role, but not in the insertive role. Greater feelings of universalizing homonegativity also predicted lower reported feelings of sexual attraction toward non-preferred targets. Results suggest that gynephilic men's attention and sexual attraction toward male sexual targets is influenced by homonegative attitudes and the target's sexual role.

Different Ways to Get There: Evidence of a Variable Female Sexual Response Cycle

Research has suggested women’s sexual response cycle may vary more than previously thought. We asked 769 sexually active women between the ages of 18–70 to report on their sexual desire and arousal patterns during their last sexual experience. Using a latent class mixture model from retrospective sexual response data, we found six classes of desire and arousal patterns (Low, Middle Steady, High Fluctuation, Low Fluctuation, Upper Steady, High). We examined how these patterns were related to demographics, outcomes during the sexual experience, and outcomes for the global relationship. The Low sexual response class (8% of women) was significantly different from other classes in duration of the sexual experience, orgasms, and overall satisfaction with the sexual experience. Most sexual response patterns were associated with healthy relational and sexual outcomes. All classes except for the Low arousal and desire class showed associations with a neutral or positive sexual satisfaction evaluation. The non-problematic variation of women’s sexual experience is an important concept to consider as it impacts determinations of dysfunction and women’s self-evaluations. Not all women need to experience high levels of arousal throughout the sexual experience or to have desire at the outset in order to have positive sexual experiences and sexual outcomes.

Sexual Arousal Patterns of Identical Twins with Discordant Sexual Orientations

Genetically identical twins can differ in their self-reported sexual orientations. However, whether the twins’ subjective reports reflect valid differences in their sexual orientations is unknown. Measures of sexual orientation, which are free of the limitations of self-report, include genital arousal and pupil dilation while viewing sexual stimuli depicting men or women. We examined these responses in 6 male twin pairs and 9 female twin pairs who reported discordant sexual orientations. Across measures, heterosexual male twins responded more strongly to women than to men. Their homosexual co-twins showed an opposite pattern. Heterosexual female twins responded equally to both sexes, whereas their homosexual co-twins responded somewhat more to women than men. These differences within pairs were similar to differences between unrelated heterosexual and homosexual males and females. Our study provides physiological evidence confirming twins’ discordant sexual orientations, thereby supporting the importance of the non-shared environment for the development of sexual orientation and sexual arousal.

The effect of static versus dynamic stimuli on visual processing of sexual cues in androphilic women and gynephilic men.

Models of sexual response posit that attentional processing of sexual cues is requisite for sexual responding. Despite hypothesized similarities in the underlying processes resulting in sexual response, gender differences in sexual arousal patterns are abundant. One such gender difference relates to the stimulus features (e.g. gender cues, sexual activity cues) that elicit a response in men and women. In this study, we examined how stimulus modality (static visual images versus dynamic audiovisual films) and stimulus features (gender, sexual activity and nonsexual contextual cues) influences attentional (i.e. gaze) and elaborative (i.e. self-reported attraction (SRA), self-reported arousal) processing of sexual stimuli. Men's initial and controlled attention was consistently gender-specific (i.e. greater attention towards female targets), and this was not influenced by stimulus modality or the presence of sexual activity cues. By contrast, gender-specificity of women's attention patterns differed as a function of attentional stage, stimulus modality and the features within the stimulus. Degree of specificity was positively predictive of SRA in both genders; however, it was not significantly predictive of self-reported arousal. These findings are discussed in the context of gendered processing of visual sexual information, including a discussion of implications for research designs.

Sexual Arousal and Sexually Explicit Media (SEM): Comparing Patterns of Sexual Arousal to SEM and Sexual Self-Evaluations and Satisfaction Across Gender and Sexual Orientation.

IntroductionInvestigations of patterns of sexual arousal to certain groups of sexually explicit media (SEM) in the general population in non-laboratory settings are rare. Such knowledge could be important to understand more about the relative specificity of sexual arousal in different SEM users.Aims(i) To investigate whether sexual arousal to non-mainstream vs mainstream SEM contents could be categorized across gender and sexual orientation, (ii) to compare levels of SEM-induced sexual arousal, sexual satisfaction, and self-evaluated sexual interests and fantasies between non-mainstream and mainstream SEM groups, and (iii) to explore the validity and predictive accuracy of the Non-Mainstream Pornography Arousal Scale (NPAS).MethodsOnline cross-sectional survey of 2,035 regular SEM users in Croatia.Main Outcomes MeasuresPatterns of sexual arousal to 27 different SEM themes, sexual satisfaction, and self-evaluations of sexual interests and sexual fantasies.ResultsGroups characterized by sexual arousal to non-mainstream SEM could be identified across gender and sexual orientation. These non-mainstream SEM groups reported more SEM use and higher average levels of sexual arousal across the 27 SEM themes assessed compared with mainstream SEM groups. Only few differences were found between non-mainstream and mainstream SEM groups in self-evaluative judgements of sexual interests, sexual fantasies, and sexual satisfaction. The internal validity and predictive accuracy of the NPAS was good across most user groups investigated.ConclusionsThe findings suggest that in classified non-mainstream SEM groups, patterns of sexual arousal might be less fixated and category specific than previously assumed. Further, these groups are not more judgmental of their SEM-related sexual arousal patterns than groups characterized by patterns of sexual arousal to more mainstream SEM content. Moreover, accurate identification of non-mainstream SEM group membership is generally possible across gender and sexual orientation using the NPAS.Hald GM, Stulhofer A, Lange T, et al. Sexual Arousal and Sexually Explicit Media (SEM): Comparing Patterns of Sexual Arousal to SEM and Sexual Self-Evaluations and Satisfaction Across Gender and Sexual Orientation. Sex Med 2018;6:30–38.

Taxometric analyses of pedophilia utilizing self-report, behavioral, and sexual arousal indicators.

Pedophilia refers to the recurrent, intense sexual interest in prepubescent children who, by definition, have not developed any secondary sex characteristics. Researchers have begun to investigate whether persons with pedophilia are qualitatively different from those without pedophilia (pedophilia is a taxon) or if people vary in their level of sexual interest toward children (pedophilia is dimensional). Two relatively small studies have previously attempted to address this question, but produced conflicting results. The present study built on these studies with a substantially larger sample of 2,227 men who committed sexual offenses and were assessed at a sexual behavior clinic. The present study also examined a broader range of measures more closely approximating the diagnostic criteria for pedophilic disorder, including phallometric assessment of sexual arousal patterns. The results of 3 taxometric analyses did not find support for the assertion that pedophilia is a taxon. (PsycINFO Database Record