People say that a dogs mouth is cleaner then a humans but even so I wouldn't let a human sit on me and slobber and lick all over my face, so there's no way I'd let a dog lol, it's nasty, I know letting dogs lick your cuts and wounds is good however, they have some healthy bacteria in their saliva which helps to clean and heal the wound I think because from my experience, when dogs lick your cuts they seem to heal faster or better...