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The best way to find out what a person thinks of the other on a blind date is to look at their eyes, because the pupil is the first part of the body that reveals sexual interest. When people spot a person to whom they are sexually attracted, pupils dilate from the normal 3 to 4 mm to 8 to 9 mm within just 0.2 seconds.
Sexual excitement stimulates the sympathetic nerve, causing the heart to pound and the breath to come faster. Some people also sweat. The reason the pupils dilate is that the eyes are the closest organ to the hindbrain, which is responsible for stimulating the sympathetic nerve system. The pupil is the most sensitive to stimulus to the sympathetic nerve system.
"A hormone called oxytocin gets released when a person gets sexually aroused. Oxytocin dilates the pupils," says Joo Chun-ki, an ophthalmology professor at the Seoul St. Mary's Hospital. In fact, there are reports of glaucoma caused after the pupils dilated during orgasm and did not return to the normal size, he added.
(englishnews@chosun.com )
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