In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Wearing red increases attraction.
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Men fall in love faster than women do.
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Parents receive 1 out of every 5 Valentines.
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Historically, sweat has been an active ingredient in perfume and love potions.
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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 Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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