i terms of nuzzling it is a natural wolf behaviour, all in the pack will nuzzle, lick and snuggle in affection...
in terms of my dogs...
kiss kiss to dodger = him waggin his tail turning his head and grumbling/talking to you...i dont know if he thinks its some kind of game, but hes all talk about it
kiss kiss to vixie = her returning the favor by obsessivly licking you for the next 5 hours!
kiss kiss to ruby = she will turn her head to the side and lean in for more kisses (she likes to be smooched on the cheek) while she closes her eyes and simply SMILES...
but cresties have a unique personality type and i swear there alien beings with higher cognitive capabilities than many other dog breeds in terms of understanding humans...
I sweat in her head shes saying "yes, go ahead, adore me!"
you know how some dogs give you that look like there clueless...
and other dogs give you that look like YOUR clueless...
cresties give you that look that says "good human now sit pretty" lol.