Hey! I've used that subreddit before, to ask dumb questions. (Why do dogs lick people for real? I don't think dogs comprehend the idea of "a kiss" which is what people always say it's equivalent to. I didn't get a strong answer FWIW but the person who replied said it was about the saltiness of your skin and that licking releases endorphins for a dog, so it calms them down, I guess?)