But most martial arts have real world applications though, though ground fighting is something that should be avoided as much as possible, because asphalt + possibly glass shards is not a good combo for your health.
Why do dogs sniff? Dogs sniff to identify, for the majority of cases it is to sniff whether or not there is danger. A dogs sense of smell is much greater than that of a human being and it can smell things from a further away distance than many other animals as well as humans.
It's good to be sure how your dog feels when you hug him or her, and how he feels when strangers go in for a hug, especially since hugs mean putting your face next to a sharp set of teeth. If a dog barely tolerates hugs, then the wrong hug at the wrong time could mean the dog snaps at the hugger.