scholarly journals Reply to Feinstein and Galupo and to Zivony: Sexual arousal pattern is an objective although imperfect window on sexual orientation

2020 ◽  
Vol 117 (50) ◽  
pp. 31579-31579
Author(s):  
J. Michael Bailey
Keyword(s):  
Sexual Orientation ◽  
Sexual Arousal ◽  
Arousal Pattern

scholarly journals Gender dysphoria and sexual euphoria - A Bayesian perspective on the influence of gender-affirming hormone therapy on sexual arousal

2021 ◽  
Author(s):  
Manfred Klöbl ◽  
Murray Bruce Reed ◽  
Patricia Handschuh ◽  
Ulrike Kaufmann ◽  
Melisande Elisabeth Konadu ◽  
...  
Keyword(s):  
Sexual Orientation ◽  
Hormone Therapy ◽  
Sexual Arousal ◽  
Response Patterns ◽  
Erotic Stimuli ◽  
Trans Men ◽  
Subjective Sexual Arousal ◽  
In Trans ◽  
Trans Women ◽  
In Cis

While the concept of sexual orientation is more clearly defined in cisgender, this is less so in transgender individuals. Both experienced gender and sex hormones have a relation to sexual preferences, arousal in response to erotic stimuli, and thus sexual orientation. In transgender individuals sexual orientation occasionally changes before or during transition, which may involve gender-affirming hormone therapy. Using functional magnetic resonance imaging, we investigated whether the neuronal and behavioral patterns of sexual arousal in transgender individuals moved from the given (before) to their chosen gender after 4.5 months of hormone therapy. To this aim, trans women and men as well as age-matched cisgender controls rated visual stimuli showing heterosexual, lesbian or gay intercourse for subjective sexual arousal. Utilizing a Bayesian framework allowed us to incorporate behavioral findings in cisgender individuals of different sexual orientations. The hypothesized changes in response patterns could indeed be observed in the behavioral responses to the single but not the differentiation between stimulus categories with the strongest results for trans men and lesbian scenes. Activation of the ventral striatum supported our hypothesis only for lesbian scenes in trans women. This prominent role of lesbian stimuli might be explained by their differential responses in cis women and men. We show that correlates of sexual arousal in transgender individuals might change in direction of the chosen gender. Future investigations longer into transition might resolve the discrepancy on behavioral and neuronal levels.

scholarly journals Neural substrates of sexual arousal are not sex dependent

2019 ◽  
Vol 116 (31) ◽  
pp. 15671-15676 ◽  
Author(s):  
Ekaterina Mitricheva ◽  
Rui Kimura ◽  
Nikos K. Logothetis ◽  
Hamid R. Noori
Keyword(s):  
Sex Differences ◽  
Sexual Orientation ◽  
Sexual Arousal ◽  
Visual Stimuli ◽  
Brain Regions ◽  
Neural Basis ◽  
Men And Women ◽  
Biological Sex ◽  
Sexual Stimuli ◽  
Visual Sexual Stimuli

Sexual arousal is a dynamical, highly coordinated neurophysiological process that is often induced by visual stimuli. Numerous studies have proposed that the cognitive processing stage of responding to sexual stimuli is the first stage, in which sex differences occur, and the divergence between men and women has been attributed to differences in the concerted activity of neural networks. The present comprehensive metaanalysis challenges this hypothesis and provides robust quantitative evidence that the neuronal circuitries activated by visual sexual stimuli are independent of biological sex. Sixty-one functional magnetic resonance imaging studies (1,850 individuals) that presented erotic visual stimuli to men and women of different sexual orientation were identified. Coordinate-based activation likelihood estimation was used to conduct metaanalyses. Sensitivity and clustering analyses of averaged neuronal response patterns were performed to investigate robustness of the findings. In contrast to neutral stimuli, sexual pictures and videos induce significant activations in brain regions, including insula, middle occipital, anterior cingulate and fusiform gyrus, amygdala, striatum, pulvinar, and substantia nigra. Cluster analysis suggests stimulus type as the most, and biological sex as the least, predictor for classification. Contrast analysis further shows no significant sex-specific differences within groups. Systematic review of sex differences in gray matter volume of brain regions associated with sexual arousal (3,723 adults) did not show any causal relationship between structural features and functional response to visual sexual stimuli. The neural basis of sexual arousal in humans is associated with sexual orientation yet, contrary to the widely accepted view, is not different between women and men.

scholarly journals Sexual Orientation, Sexual Arousal, and Finger Length Ratios in Women

2021 ◽  
Author(s):  
Luke Holmes ◽  
Tuesday M. Watts-Overall ◽  
Erlend Slettevold ◽  
Dragos C. Gruia ◽  
Jamie Raines ◽  
...  
Keyword(s):  
Sexual Orientation ◽  
Sexual Arousal ◽  
Ring Finger ◽  
Prenatal Development ◽  
Behavioral Traits ◽  
Sexual Stimuli ◽  
Digit Ratios ◽  
Heterosexual Women ◽  
Prenatal Androgens ◽  
Sexual Responses

AbstractIn general, women show physiological sexual arousal to both sexes. However, compared with heterosexual women, homosexual women are more aroused to their preferred sex, a pattern typically found in men. We hypothesized that homosexual women’s male-typical arousal is due to their sex-atypical masculinization during prenatal development. We measured the sexual responses of 199 women (including 67 homosexual women) via their genital arousal and pupil dilation to female and male sexual stimuli. Our main marker of masculinization was the ratio of the index to ring finger, which we expected to be lower (a masculine pattern) in homosexual women due to increased levels of prenatal androgens. We further measured observer- and self-ratings of psychological masculinity–femininity as possible proxies of prenatal androgenization. Homosexual women responded more strongly to female stimuli than male stimuli and therefore had more male-typical sexual responses than heterosexual women. However, they did not have more male-typical digit ratios, even though this difference became stronger if analyses were restricted to white participants. Still, variation in women's digit ratios did not account for the link between their sexual orientation and their male-typical sexual responses. Furthermore, homosexual women reported and displayed more masculinity than heterosexual women, but their masculinity was not associated with their male-typical sexual arousal. Thus, women’s sexual and behavioral traits, and potential anatomical traits, are possibly masculinized at different stages of gestation.

Who are gynandromorphophilic men? Characterizing men with sexual interest in transgender women

2015 ◽  
Vol 46 (4) ◽  
pp. 819-827 ◽  
Author(s):  
K. J. Hsu ◽  
A. M. Rosenthal ◽  
D. I. Miller ◽  
J. M. Bailey
Keyword(s):  
Sexual Orientation ◽  
Sexual Arousal ◽  
Sexual Attraction ◽  
Sexual Interest ◽  
Transgender Women ◽  
Heterosexual Men ◽  
Homosexual Men ◽  
Male And Female ◽  
Erotic Stimuli ◽  
Subjective Sexual Arousal

BackgroundGynandromorphophilia (GAMP) is sexual interest in gynandromorphs (GAMs; colloquially, shemales). GAMs possess a combination of male and female physical characteristics. Thus, GAMP presents a challenge to conventional understandings of sexual orientation as sexual attraction to the male v. female form. Speculation about GAMP men has included the ideas that they are homosexual, heterosexual, or especially, bisexual.MethodWe compared genital and subjective sexual arousal patterns of GAMP men with those of heterosexual and homosexual men. We also compared these groups on their self-ratings of sexual orientation and sexual interests.ResultsGAMP men had arousal patterns similar to those of heterosexual men and different from those of homosexual men. However, compared to heterosexual men, GAMP men were relatively more aroused by GAM erotic stimuli than by female erotic stimuli. GAMP men also scored higher than both heterosexual and homosexual men on a measure of autogynephilia.ConclusionsResults provide clear evidence that GAMP men are not homosexual. They also indicate that GAMP men are especially likely to eroticize the idea of being a woman.

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