Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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Historically, sweat has been an active ingredient in perfume and love potions.
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Wearing red increases attraction.
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Intelligent men tend to be more sexually faithful.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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