If you have struggled for so long to find out the reason why your dogs like to lick you, then it is time for you to find out the truth. You have to know that it is in their nature to lick, but there are also a couple of other reasons why do they express their love this way. A lot of people have their own theories why your dog likes to lick you all day everyday, but here are 5 reasons concluded by different studies. We have decided to share with you the following reasons that explain why your dogs like to lick you at all times. If you have further questions, then don’t hesitate to ask us, we will do our best to answer all your questions. I hope this information helps you understand your four-pawed little companions even more.
1- First of all when your dogs lick you, this indicates the strong bond the two of you share together. This is your dog’s way of telling you “I LOVE YOU.” 
2- Second dogs lick your face because they greet you. If you have paid attention, then you might as well know that dogs tend to lick you every time you get back home. 
3- I know this might sound a little bit awkward but dogs like the salt on your skin. so whenever they start licking you, and they can’t seem to stop, then you should know that they are enjoying the salt in your skin. YUM 😛 
4- Dogs lick you because they like your company. Whenever you play with your dog, or whenever you are having a good time together, they lick you to thank you for keeping them company. 
5- And most importantly: Dogs lick you because they are in love with you. This is their way of showing you their love. 
Source: Urdogs