Even though dog licking is not a hazardous comportment like jumping up on someone is when they first come through the front door, this is still deemed as inappropriate conduct for dogs and is a tendency that may result in the owner's embarrassment; such a thing may prevent house guests from feeling welcome or at ease in their household.
Ideas
At the top of the list of suggestions for dog owners to follow beginning when the dog is still a puppy is maintaining consistency and teaching the dog to behave the same way toward them as they want it to behave toward others. When an owner permits the dog to jump up on him, the dog will not realize that is is not permissible to do the same to visitors. The dog will not get why it is the owner's wishes for him to not lick a visitor's face or hands, if the dog owner lets the dog constantly lick his hands or face. The secret to training a dog successfully is persistence, teaching the dog what behavior is acceptable and praising him for his obedience regularly.
While the owner may believe that it is a wonderful thing for the dog to lick him when he comes home, evidencing excitement and attention, there are many better behaviors besides licking which are more apropos for the dog to exhibit. One approach an owner could use to prevent licking would be to ignore and avoid their dog each time they attempt to lick them. An owner needs to avoid any eye contact with their dog and ought not to pay any attention to them until the licking has come to a stop. The owner is able to offer the dog attention and praise for correct behavior, after the animal has settled down. The owner must make the dog cease from licking his hand by withdrawing it and turning aside from the animal, as well as insisting that he will not make eye contact until after the settles down, if the animal has a persistent habit of licking the owner's hands.
When an owner bolsters their dog's good behavior, they are also teaching him not to lick when other people enter the household. Now that the dog understands that attention will not be given when he licks him, the dog will probably refrain from licking other people who come in through the front door, as well. In addition, the owner should advise visitors how to react should the dog attempt to lick them, so that they in effect are showing and reinforcing the same behavior that the owner uses to stop dog licking.