Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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You burn 26 calories in a one minute kiss.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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When dragonflies mate, their tails form a love heart.
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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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'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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40% of people who are rejected in romantic love slip into clinical depression.
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