FURVERT!

2015 anatomically_correct animal_genitalia anus backsack balls butt digital_media_(artwork)equid equine feral flaccid fur genitals hair hi_res hooves horse horse_tail long_hair lying male mammal mane monochrome muscular muscular_feral muscular_male nude on_back penis perineum puffy_anus reinkorn simple_background solo spread_legs spreading