abs anthro athletic body_size_growth dark_body dark_fur duo expansion eyes_closed fellatio female fur genital_expansion growth kneeling kneeling_on_ground male male/female motion_lines muscle_growth muscular oral penile penis_expansion sex simple_background sitting size_transformation slim surprise transformation white_background yellow_body yellow_fur wheel_of_fortune bird_dog canid canine canis domestic_dog golden_retriever hunting_dog mammal retriever hi_res sequence