Yes, kissing spreads bacteria among each other. According to many researches, the number of bacteria transferred from one kiss to each other is up to 80 million bacteria in a 10 second kiss. A kiss can transfer up to 700 different strains of bacteria. Partners who kiss at least nine times a day share similar oral bacterial communities. Some bacteria are transferred to each other’s mouth more easily than others. The bacterial composition of the mouth does not change much after a kiss because couples may have already kissed so…
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