rule 34 2017 abs aiden saunders anthro balls biceps biped black claws black eyebrows black eyes black nose blue background border claws digital media artwork eyebrows flaccid front view fur genitals glans grey border grin hi res humanoid genitalia humanoid penis knuxlight looking at viewer male male only mammal moobs muscular muscular anthro muscular male nipples nude outside border partially retracted foreskin pecs penis pink nipples polar bear portrait short tail simple background small tail smile solo standing stocky teeth three quarter portrait uncut ursid ursine white balls white body white fur white penis white tail 3934887