The kiss is certainly the most well-known and appreciated romantic gesture, a very sweet way to feel united and get in touch in an intimate way. But Dutch research has recently broken magic, showing that on a 10-second kiss an average of 80 million bacteria are exchanged.
The study was carried out by ingesting one of the partners of some couples, in a controlled environment, a special probiotic yogurt, in order to then measure the quantity of organisms in the mouth of the other partner after the kiss.
Thanks to the kisses the partners tend to have a composition of the bacterial flora of the similar mouth. But a single kiss is not enough: the similarity was noted in the couples who kissed more.
The similarity of the bacteria at the level of the tongue, on the other hand, was not closely related to the number of kisses. Probably because the bacteria that colonize that area are more resistant. Bacteria or not, kisses remain a sweet exchange between two people who love each other, so it's impossible to do without them!