'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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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Men who kiss their wives in the morning live five years longer than those who don't.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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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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Kissing an infection-free partner is good for your teeth!
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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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You burn 26 calories in a one minute kiss.
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