rule 34 16th century after birth anatid ancient art anseriform anserinae areola avian baby balls beak bird birth breasts brown hair building destruction cesare da sesto duo focus egg embrace european mythology feathered wings feathers feet female feral formal art genitals grass greek mythology group hair happy hatched human humanoid feet humanoid hands interspecies leda leda and the swan male mammal medium breasts membrane anatomy micropenis mythology narrowed eyes navel nipples nude oil painting artwork outside painting artwork penis plant plantigrade public domain romantic romantic couple small penis smile swan tan body tan skin toes traditional media artwork tree webbed feet wings young zeus zoophilia 9021328