Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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The single biggest predictor of love is proximity.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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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 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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According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
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