3 ms·Humans french kiss each other, and we don't have clean mouths most of the time, either.by Retra 11y agoHumans french kiss each other, and we don't have clean mouths most of the time, either.weavie 11y agoWe don't tend to eat our friends excrement..Retra 11y agoWell, I've never seen a dog do that, and I've lived with quite a few.thret 11y agoAll mother dogs do this.