FURVERT!

anthro anus avian big_butt bird bovid bovine butt corvid corvus_(genus)crow doctordj dominant dominant_female duo female female_on_top horn inside larger_dom larger_female larger_penetrated male male/female male_on_bottom mammal monochrome on_bottom on_top oscine passerine penetration power_bottom puffy_anus reverse_cowgirl_position sex size_difference smaller_male