anthro anus backsack balls bedding black_body black_fur black_nose brown_body brown_eyes brown_fur butt fur genitals looking_at_viewer looking_back looking_back_at_viewer lying male on_front pillow pink_anus presenting presenting_anus raised_tail rear_view solo white_body white_fur smiley canid canine canis domestic_dog german_shepherd herding_dog mammal pastoral_dog