Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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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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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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'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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