Rule 34 Dev - anatid anseriform anthro anus ass autofellatio avian backsack balls bird blue_body duck erection eyebrows feathers genitals hi_res humanoid_genitalia humanoid_penis looking_at_viewer male male_only masturbation membrane_(anatomy) muscular muscular_anthro muscular_male nenwef oral oral_masturbation penile penile_masturbation penis presenting presenting_hindquarters raised_eyebrow raised_tail solo spreading sweet_yissus talons webbed_feet|4448411440