Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Speed dating was invented by a Rabbi in 1999.
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Men who kiss their wives in the morning live five years longer than those who don't.
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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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The left ear is more responsive to words of love and emotion whispered into it than the right.
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Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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