FURVERT!

animal_genitalia animal_penis anthro anus balls clothing equid equine equine_genitalia equine_penis erection genitals half-closed_eyes hooves horse jockstrap looking_pleasured lying male mammal masturbation morhlis musk narrowed_eyes on_back penis pony scent_play simple_background sniffing sniffing_clothes solo spread_legs spreading underwear underwear_sniffing