Their tongues are not as clean as you think

Many people let their dogs lick their own wounds because they think that a dog’s tongue has healing properties, but this is just a myth. If you are one of these people, don’t do this at all, as wounds can become infected and cause severe problems. Dogs can use their tongue to clean their body, but that’s all. 

Another myth is that dogs have cleaner mouths than humans, but they both contain hundreds of bacteria. “That is just this constant myth that people have,” Hohenhaus says. “Nobody would put bacteria on a wound. Why would you put a tongue, which has all these bacteria, on a wound? It doesn’t make sense.”