He arrived home early from work and carefully slid his key into the lock, turning it slowly until the bolt was fully retracted. He turned the knob all the way before slowly easing the door open. The house was totally quiet as he slipped in, except for the quiet lapping of the dog's tongue as he busily licked his balls in the middle of the kitchen floor.
It must have been getting good to him, because the man was well inside the house before the dog was startled to the awareness that his private moment had been shattered. It was good that the dog had been busy pleasuring himself and hadn't raised the alarm by barking and thus ruining the man's plan. Once over the initial surprise, the dog was very much happy to see the man home at last. The man patted his faithful canine and led him to the crate in which he usually spent his nights.