... towards men, and men are raised in this society to seek and respond to "visual stimuli", men will interact most with these materials and have greater psychosexual response to them (MacIan 1994). Like the many diverging viewpoints, the research evidence is also mixed. There is even some evidence suggesting women may be more physiologically responsive to more types of pornography than men are. A November 2001 study conducted at Northwestern University in Evanston, Illinois by Micheal Bailey and Meredith Chivers measured the physiological responses of 29 heterosexual female students to heterosexual and lesbian pornographic videos. They used a four-inch tampon-shaped probe called a photo-plethysmograph inserted into female participant's vaginas to measure sexual arousal. The findings revealed that the women in the study were aroused by both heterosexual and lesbian sex. Last year researchers carried out a similar study on Chicago-area men, finding heterosexual men generally weren't aroused by gay ...

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