Men who kiss their wives in the morning live five years longer than those who don't.
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The average person will go on a date at least 100 times before they finally marry.
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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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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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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Historically, sweat has been an active ingredient in perfume and love potions.
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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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Speed dating was invented by a Rabbi in 1999.
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