Rule 34 Dev - 4_toes animal_genitalia animal_penis balls blep canine_genitalia canine_penis claws erection feet feral flop fur genitals knot looking_at_viewer lying male nude on_back pawpads paws penis presenting quadruped seductive simple_background smile solo toe_claws toes tongue tongue_out upside_down heliofox canid canine canis fox mammal digital_media_(artwork)|13717461135