In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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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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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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Historically, sweat has been an active ingredient in perfume and love potions.
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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 Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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