abs animal_genitalia anthro athletic balls black_nose blush brown_body casual_nudity duo flaccid fully_sheathed fur genitals green_eyes inside looking_at_viewer male male/male muscular navel nipples nude penis sheath smile standing tuft twokinds anontk remus_(twokinds) romulus_(twokinds) canid canine canis mammal wolf digital_media_(artwork) hi_res