So, how long after a dog licks his butt does that trace matter stay in his mouth with all that saliva saliva constantly washing his mouth? It would take medical level instruments to detect the amount of anyrhing but dog saliva on his tongue.
Meanwhile, dog saliva is an antibacterial disinfectant. So is human saliva for that matter. This is why so many bad diseases require blood to blood contact and cant transfer from kissing, for example.
I’ll pass, thanks.