Sometimes. My Border Collie will "smooch" where he just gives a quick, single lick. But, both he and my Papillon will try to lick when they have no intention of showing affection. Both adore the scent of my body lotion and try to lick me when I wear it. Both of the dogs lick me out of boredom. If I'm sitting down and don't have shoes on, they try to lick my feet. Strange little creatures.
so really.. sometimes it's a kiss, most of the time it's just to be annoying or taste the citrus-scented lotion.