'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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One in five long-term love relationships began with one or both partners being involved with others.
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Men fall in love faster than women do.
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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 Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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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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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
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