Because there is a natural built-in limit to the length and scope of the conversation, and because much of what one dog-owner needs to communicate to another in a small, enclosed space is “I think you are doing a good job with your dog and you don’t need to worry about mine.”
Dog Owner A [sheepishly]: Acknowledges natural dog behavior
Dog Owner B [knowingly]: I share this behavior in my own life
Dog Owner A [relieved]: We are all like this dog
Exeunt
Dog Owner A [unnecessarily]: Apologizes for normal, safe dog behavior
Dog Owner B [also unnecessarily]: Apologizes for something that has not happened
Dog Owners A and B [relieved]: We are both like our dogs
Exeunt
Dog Owner A [proudly] Describes the dog’s tiredness as a human achievement
Dog Owner B: Asks age of dog
Dog Owner A [as if offering a surprise]: Dog’s age
Dog Owner B [in surprise]: Would have guessed a different dog’s age
Exeunt
Dog Owner A [shame-faced]: My dog is friendly, should I tell it not to be?
Dog Owner B [simultaneously]: Tortured sentence structure in an attempt not to use sexed referents toward dog
Dog Owner A [ostentatiously]: Statement making dog’s sex obvious
Dog Owner B [in tremendous relief]: Employs sexed referents to describe beauty of dog
Exeunt
Dog Owner A [unnecessarily]: Comments on how much dog enjoys going outside
Dog Owner B [knowingly]: Contrasts with human preference for staying inside
Dog Owner A[unnecessarily]: We are unlike this dog
Exeunt
About my (maybe too friendly?) dog: oh, he gets ~no~ attention at home! (with a self-conscious chuckle that indicates he is, in fact, completely coddled.)
"It smells mine!"