In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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40% of people who are rejected in romantic love slip into clinical depression.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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The average person will go on a date at least 100 times before they finally marry.
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In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
27
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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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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Historically, sweat has been an active ingredient in perfume and love potions.
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