Why does my dog continously lick my hands?

My dog likes to lick my hands all the time, even my Mom's.Is this a sign of affection, or is he just cleaning our hands?

he might need more salt in his diet, my horses do the same thing when they need more salt

lol its just a behavior of your dog that need to be train, it is a self affection for himTraining is the best investment you can make in your relationship with your dog. You'll need to do your homework first, though, to learn how to communicate what you want in a way that your dog will understand. Stay consistent and patient, reward your dog for getting it right and remember: you can train a dog of any agehttp://dogtime.com/training.html

mine does that all the time its because he cant reach your head