One in five long-term love relationships began with one or both partners being involved with others.
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Speed dating was invented by a Rabbi in 1999.
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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 Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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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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