Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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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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Twenty nine percent of women spend more time shopping for shoes than they do looking for a life long mate.
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Wearing red increases attraction.
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Speed dating was invented by a Rabbi in 1999.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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