FURVERT!

2019 alternate_version_at_source animal_genitalia animal_penis balls black_body black_penis black_tail dated equid equine equine_genitalia equine_penis erection feral genitals horse hybrid_genitalia hybrid_penis knot knotted_equine_penis knotted_penis male mammal mane markings penis red_balls red_body red_eyes red_mane red_tail rufciu signature simple_background solo striped_markings striped_tail stripes tail tail_markings