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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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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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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Men fall in love faster than women do.
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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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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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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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