Is it normal I'm repulsed by people kissing their dog on its mouth

Ehh, so is touching just about anything in a home or public place.

People are nasty creatures and the guy in line in front of you could have scratched his dirty, bare ass crack just seconds before walking into the store. You touch the door handle right after his stank fingers do, you then rub your eye or some shit. Ta da! Strange man as crack funk all up on your eye!!!! Now its infected and oozing. Great. Not to mention that his dirty cash, which he folded thrice and used to clean under his butt crevice scratchin fingernails, is now in your hands as part of your change. Now its in your pocket or wallet. You're just a festering germ transporter.

I'd rather kiss my dogs on the mouth.