“...self-reported heterosexual men who have had sex with other men …respond more to depictions of adult women than do men without such experience”

[ranierean]

Phallometric response profiles of the four groups. The figure shows the mean response to each stimulus category, bracketed by its 95% confidence interval. Each group is shown in a separate panel. Abbreviations for stimulus categories: AW—adult women, PG—pubescent girls, PPG—prepubescent girls, PPB—prepubescent boys, PB—pubescent boys, AM—adult men

This was a study of 2,278 men, mostly sex offenders, who had undergone phallometric testing as part of a clinical assessment. Phallometric testing is a psychophysiological technique for assessing erotic interests in male adults and adolescents. Increases in the patient’s penile blood volume (i.e., degrees of penile erection) are used as the measure of his attraction to different classes of persons.

...the test stimuli were audiotaped narratives presented through headphones and accompanied by slides. There were six categories of potentially erotic narratives, which described sexual interactions with prepubescent girls, pubescent girls, adult women, prepubescent boys, pubescent boys, and adult men. The accompanying slides were still photographs of nude models corresponding in age and sex to the topic of the narrative.

Blanchard, R. Studying Fraternal Birth Order in Homosexual Women and Bisexual Men. Arch Sex Behav 52, 2973–2978 (2023).