Night vision is not known for helping anyone get better in the bedroom, but infrared cameras reveal that women become aroused as quickly as men. In previous research, sexual arousal was generally detected with instruments that require genital contact and manipulation. One might argue that can spoil the mood. Thermal imaging technology, which uses cameras that detect heat given off by different objects, is a relatively non-invasive way of measuring the time it takes a person to reach peak arousal. So researchers focused the cameras on the genitals of test subjects while the subjects watched footage of pornography, travel shows and horror clips. This provided measurements of heat from both the sexually aroused and from whatever arousal or lack of it was spurred by the other programming. ‘Comparing sexual arousal between men and women, we see that there is no difference in the amount of time it takes healthy young men and women to reach peak arousal,’ said Irv Binik, a McGill University psychology professor and founder and director of the Sex and Couple Therapy Service of Royal Victoria Hospital. Binik and colleagues were able to detect temperature changes to within 100th of a degree. […]

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