rule 34 2017 4 toes animal genitalia animal penis avian balls beak black balls black beak black eyes black feathers black fur blue feathers blue pawpads canine canine penis claws digital media artwork feathered wings feathers feral fluffy fluffy tail front view full length portrait fur gryphon looking at viewer male male only mammal pawpads paws penis portrait precum purple background quadruped red penis sheath simple background solo spread wings talons thaine toe claws toes wings yaroul yellow sclera 2574732