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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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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One in five long-term love relationships began with one or both partners being involved with others.
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In 2010, Gary Richmond was beaten into a coma. He woke up with amnesia and no memory of his wife of 20 years. Subsequently, he ended up falling in love with her all over again!
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Couples' personalities converge over time to make partners more and more similar.
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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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You burn 26 calories in a one minute kiss.
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