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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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
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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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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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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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