FURVERT!

anatomically_correct anatomically_correct_genitalia anatomically_correct_penis animal_genitalia animal_penis anus balls black_anus black_balls black_penis black_perineum butt draft_horse equid equine equine_anus equine_balls equine_genitalia equine_penis equine_tail erection feral flared_penis genitals grey_body grey_skin heiken horse laser_(artist)looking_at_viewer looking_back male male_feral mammal medial_ring muscular muscular_feral muscular_male penis perineum presenting presenting_anus presenting_hindquarters presenting_penis puffy_anus quadruped raised_tail solo tail vein veiny_legs veiny_thighs