FURVERT!

animal_genitalia animal_penis anus balls bdsm blue_eyes blush bondage bound brown_balls brown_body brown_penis dolero equid equine equine_anus equine_genitalia equine_penis erection feral genitals hi_res horse huskii-s lying male mammal narrowed_eyes on_back open_mouth penis puffy_anus restraints rope rope_bondage simple_background solo spotted_back teeth vein veiny_penis