rule 34 2023 anthro anus ass avian balls beak biped bird blue balls blue body blue feathers blue perineum digital media artwork falco lombardi feathers foreskin furry furry only genitals hi res humanoid genitalia humanoid penis looking back lying male male only mostly nude nintendo nopetrol on front penis perineum rear view red scarf scarf scarf only solo spread legs spreading star fox tail feathers yellow beak 7472936