A dog's disposition stays the same all month long. Dogs never need to examine the relationship. A dog's parents never visit. Dogs like beer. Dogs love long car trips.
Dogs understand that instincts are better than asking for directions.
Dogs understand that all animals smaller than dogs were made to be hunted. When a dog gets old and starts to snap at you incessantly, you can shoot it. Dogs will actually wear that studded leather collar you bought them last year. After the Lord had created Man, he chose to give him 20 years of a Normal Sex Life. The Lord was very sound on the subject.