When puppies play they often bite, chew and mouth other puppies, which means that they do the same thing to humans. Biting people is quite normal and healthy, and in no way aggressive, and is actually a sign of affection.
Although biting people is not something that most owners want their puppy to do, it is also something that should be encouraged. But in the right way. Which means teaching your puppy biting manners. You don’t want your puppy to stop biting, but you want it to learn bite inhibition. This is the ability to control how hard or soft a puppy bites, which is something you definitely want to teach your pup. Having good bite inhibition is a great quality in a dog, so teaching your puppy this early will be beneficial. This means that as your poppy gets older it will know not to ever penetrate the skin, and just bite in a playful, soft way. This not only works with people, but also with other dogs, and means that your puppy can socialise well with other dogs.