anthro anthro_on_feral anthro_penetrated balls bestiality duo female female_on_feral feral feral_penetrating feral_penetrating_anthro genitals male male/female penetration penis sex size_difference furlow asinus donkey equid equine mammal ursid
Yadda yadda, something about the barn cat in the barn, yadda yadda.  Couldn't think anything clever :P