Here's The Dirty Truth About Kissing

You may not think of kissing as a gross activity, but there's plenty of science that proves swapping spit is a whole lot dirtier than you'd think, and not in a good way. Here's a look into the dirty truth about kissing. Perhaps one of the most obvious downsides to kissing is that it can transfer germs between the two people locking lips. A 2014 study published in Microbiome Journal found that, on average, there was a total bacterial transfer of 80 million bacteria per intimate kiss of 10 seconds. The more you know, right? Additionally, Kelly Reynolds, a microbiologist at the University of Arizona's Zuckerman College of Public Health, told Cosmopolitan that mouths serve as a transmission route for germs because there is a close connection with the gastrointestinal and respiratory systems. And these parts of our insides are common sites of infections for germs. It's pretty overwhelming to think about, but important to remember before you decide to move in on that hottie at the bar. Keep watching to see Here's The Dirty Truth About Kissing! #Kissing Bacteria super-highway | 0:00 Attraction on a biochemical level | 1:08 The kissing defense | 2:01 The flu loves when you kiss | 2:45 Kissing for life | 3:33 Spreading cold sores | 4:40 Wait, kissing can cause cavities? | 5:38 Kissing burns calories | 6:36 Be careful with Hepatitis B | 7:27 An unlikely, but unwanted disease | 8:15 Allergic to kissing | 9:06 Kissing can lead to gum disease | 10:03 The kissing disease | 10:51 Kissing is gross, but it feels so good | 11:36