abs animal_genitalia animal_penis anthro anus balls bara barazoku big_ass big_balls big_penis butt equine_genitalia equine_penis erection flared_penis gaping gaping_anus genitals hands_behind_head hooves legs_up looking_at_viewer lying lying_down lying_on_back male medial_ring muscular muscular_anthro muscular_male nipples on_back penis puffy_anus simple_background solo vein veiny_penis white_background rulethony34tano_(director) clydesdale draft_horse equid equine horse mammal tail animated hi_res
thanks to @Murble from Discord running ToonCrafter, this horse man can now open and close his gaping anus.