rule 34 anatid animal genitalia animal penis anseriform anthro anus avian beak bird bird feet bodily fluids brown feathers cum cum drip cum in ass cum inside cum on feet dripping duck feathers genital fluids grey beak grey skin kaptcha light background male male only membrane anatomy multicolored feathers open mouth penis presenting raised leg simple background smile solo spotted feathers standing tapering penis tongue tongue out two tone feathers webbed feet 3282325