rule 34 2019 anthro anus ass backsack balls biped black claws black eyebrows black horn blurred background claws depth of field detailed background diamondwing digital media artwork dragon ear fins erection eyebrows fin genitals glans green eyes hand on butt hi res horn humanoid genitalia humanoid penis looking at viewer looking back lying male male only nude outside penis penis tuck perineum pillow pink anus presenting presenting hindquarters rear view scales scalie silgiriya mantsugosi solo white balls white body white penis white perineum white scales white tail 3935881