Kissing an infection-free partner is good for your teeth!
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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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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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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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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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The single biggest predictor of love is proximity.
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
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