Dogs and strong stinks are much like some people and loud music. (I was gonna say 'teenagers' but many aren't and I've been known to crank up the odd tune.) If it's big, whether it's sound or smell, it's good. Dogs smell any anuses they can, they sniff shit, they'll just snort rotten, drippy, putrescent dead things. Seamus probably thinks a skunk smells like the Glade ™ of the outdoors.