Dogs don't interpret "kisses" the same way we do. The face licking and kissing isn't so much affection as it is a gesture of supplication. Getting all up in a dogs face can be seen as confrontational, and possibly cause avoidance behaviors. I won't really get into that though.
Regardless of all of this, kisses like anything, can be trained. If you have treats around you when you get kisses you mark and reward the behavior. Licking your own lips quickly near the dog could trigger the behavior so you could mark reward. I would be cautious of having dogs take food out of your mouth for kisses or something like that as it could easily get you bit by accident. Many a person has lip scars from that technique.