One kiss spreads 80 million bacteria

When you kiss someone, you don't only show your affection for them; you're also spreading millions of bacteria with that person — 80 million, to be exact, according to a recent study published in the journal Microbiome.

Scientists from the Netherlands headed to Amsterdam’s Artis Royal Zoo, and asked 21 couples to participate in the study. The couples had their mouths swabbed before and after sharing a kiss.

See also: 20 Strangers Kissing for the First Time Is Strangely Sweet

To monitor the bacterial transfer, the researchers had one individual consume a probiotic yogurt drink before sharing the kiss. That way they could look for the specific bacteria found in the drink. Read more...

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