Dogs mouths are surprisingly much cleaner than humans, when it comes to germs and what not. My dog is a prude. She doesn't use her tongue when she kisses. Just presses her face against yours for a quick peck.
considering as how, i'm just not that often in anyone's company then my own, when eating or drinking anything, its not so much a matter of how i feel, but of just not the opportunity. and its a lack of opportunity i choose too, as 'entertainment' provided by corporate media, people claim to enjoy with their meals and libations, would make what little brains i have, putrify to disfunctional congieled goo.
I don't mind if a dog wants to give kisses on my cheek but not my lips,,, they might be the cleanest mouth but when I know they lick their assholes with that big sloppy slurpie sound, that kills it for me. I have seen people let their dog slurp their lips,,, ohhh crap, here comes breakfast,,, up and out!!!
Only with my girl. Sometimes it's even awkward when my dad gives me something he's drank from.. I'd never do it with mates, fuck knows where they've been ya know.