There's a simpler reason for not kissing pets on the mouth. One word answer: Yuck! Two word answer: That's gross! Q-tip's a sweet little thing, but her dogbreath would corrode galvanized sheet metal. And no way I'm kissing my cats on the mouth. I have no desire to go to the hospital and have them surgically removed from my face for no good reason. Not that there is a good reason for that -- ever.
So, Ronnie, as far as I can tell, too few of us are into French-ing our poodles to storm the Bastille over the issue. Thanks for overreacting.