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 dragonflies mate, their tails form a love heart.
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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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Kissing an infection-free partner is good for your teeth!
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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A poll has found that computer 'nerds' make the best lovers, with 82 percent of IT geeks claiming they put their partner's pleasure above their own.
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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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