Did you know that a kiss lasting 10 seconds transfers 80 million bacteria?
Kissing is certainly the best known and most appreciated romantic gesture, a sweet way to feel united and get in touch in an intimate way. However, Dutch research recently broke the magic, showing that an average of 80 million bacteria are exchanged in a 10-second kiss.
The study was carried out by having one of the partners of some couples ingest, 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 kissing, partners tend to have a similar composition of the bacterial flora of the mouth. However, a single kiss is not enough: the similarity was noticed in the couples who kissed more.
The similarity of the bacteria at the tongue level, on the other hand, was not strictly 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!