As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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The average person will go on a date at least 100 times before they finally marry.
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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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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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