I never understood why they said dogs mouths were cleaner than humans. Hard to believe when they lick themselves and other dogs, eat their own crap and who knows what else. After reading the news about a man who got a disease from a dogs licking, I really don't believe they are clean. I didn't even know it was possible, I guess it's rare there was another case in 2016 in London. First, he lost his feet but then they had to go up to the knee and take the hands as well.
https://www.cbsnews.com/news/mans-legs-amputated-after-dog-licks-lead-to-infection-family-says/