Happy International Kissing Day!

The sixth of July marks International Kissing Day or World Kissing Day. This worldwide event originally started in the United Kingdom, and has now been taking place for over a decade.

Did you know that a kiss lasting longer than 10 seconds transfers approximately 80 million living bacterial cells?

Image credits:1. Real Love!! By Sander Van Der Wel. CC-BY-SA-2.0 via Wikimedia Commons; 2. Gif via; 3.Kissing Black-tailed Prairie Dogs by Brocken Inaglory. CC-BY-SA-3.0 via Wikimedia Commons; 4. Gif via