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 giphy.com; 3.Kissing Black-tailed Prairie Dogs by Brocken Inaglory. CC-BY-SA-3.0 via Wikimedia Commons; 4. Gif via giphy.com.