4:5analanal_penetrationanatidanseriformanserineanthroanthro_on_anthroavianballsbeakbipedbirdbreastsdouble_penetrationerectionfeathersfemalegenitalsgrouphassen13intraspeciesmalenipplesnon-mammal_ballsnon-mammal_breastsnon-mammal_nipplespenetrationpenisrestrainedswantentacle_in_asstentacle_in_vaginatentacle_penetrationtentaclesthe_twelve_days_of_christmas_(song)traditional_media_(artwork)vaginalvaginal_penetrationvulva