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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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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.
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The left ear is more responsive to words of love and emotion whispered into it than the right.
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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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Wearing red increases attraction.
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Historically, sweat has been an active ingredient in perfume and love potions.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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