Pucker Up: One French Kiss Swaps 80 Million Bacteria

When you lock lips with that special person, you’re not only sharing your bubbling passions, but also your unique blend of oral bacteria.

In a study that’s sure to stoke the flames of love, scientists discovered that lovebirds exchange some 80 million bacteria after swapping spit for 10 seconds. That sounds like a cavity waiting to happen. But don’t worry: Scientists also found that it takes a lot of kisses to significantly change your mouth’s unique collection of microbes.
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