FURVERT!

2:3 alternate_version_at_source animal_genitalia animal_penis anus balls brown_eyes brown_hair brown_theme butt digital_media_(artwork)equid equine equine_genitalia equine_penis erection feral fuf full-length_portrait genitals hair hi_res hooves horse looking_back male mammal penis pinup portrait pose presenting presenting_hindquarters raised_tail smile solo tail