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Kissing is a way to show affection and appreciation for those you love. But have you ever thought about where kissing comes from or how kissing customs vary across the world? Kissing has a fascinating history and an important role in society, so much so that there are dates dedicated to the loved-up greeting and display of affection. National Kissing Day is celebrated on July 6th every year. World Kiss Day and International Kissing Day are other names for these popular holidays.

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1. How kissing is good for your health

For the majority of adults, kissing is something they don't think twice about. They may kiss their spouse when they get home from work, kiss their kids good night, or kiss their friends in greeting when they come over. You may be in the habit of kissing too, but you can rest assured this act of love is good for your health in several ways. Every kiss introduces new bacteria that strengthen the immune system. Plus, kissing stimulates saliva production to fight tooth decay.

Little boy squashing his mouth against the glass to blow a kiss Sally Anscombe / Getty Images
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