Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
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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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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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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 2010, Gary Richmond was beaten into a coma. He woke up with amnesia and no memory of his wife of 20 years. Subsequently, he ended up falling in love with her all over again!
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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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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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