Quoting: Anonymous Coward 1186690Single, Angry, Straight Male... Seeks Same?
A classic study reveals that young homophobic men have secret gay urges
Each participant then agreed to attach a penile plethysmograph to his, well, “lesser self.” According to the authors, this plethysmograph device is “a mercury-in-rubber circumferential strain gauge used to measure erectile responses to sexual stimuli. When attached, changes in the circumference of the penis cause changes in the electrical resistance of the mercury column.” Previous research with this apparatus (the plethsymograph, not the penis—well, actually both) confirmed that significant changes in circumference occur only during sexual stimulation and sleep.
Next, the participants were placed in a private chamber and presented with three 4-minute segments of graphic pornography. The three video snippets represented straight porn (scenes of fellatio and vaginal intercourse), lesbian porn (scenes of cunnilingus or tribadism), and gay male porn (scenes of fellatio and anal intercourse). Following each randomly ordered video presentation, the participant rated how sexually aroused he felt and also his degree of penile erection. Can you guess the results?
Both groups—non-homophobic and homophobic men—showed significant engorgement to the straight and lesbian porn and their subjective ratings of arousal matched their penile plethsymograph measure for these two types of video. However, as predicted, only the homophobic men showed a significant increase in penile circumference in response to the gay male porn: specifically, 26 percent of these homophobic men showed “moderate tumescence” (6-12 mm) to this video and 54 percent showed “definite tumescence” (more than 12 mm). (In contrast, for the non-homophobic men, these percentages were 10 and 24, respectively.) Furthermore, the homophobic men significantly underestimated their degree of sexual arousal to the gay male porn.
[link to www.scientificamerican.com