Rule 34 Dev - animal_genitalia animal_penis anthro anus ass ass_up balls big_butt bondage bondage bound elbestia equid equine equine_genitalia equine_penis gag gagged genitals hooves horse male mammal muscular muscular_male nude penis presenting presenting_anus presenting_hindquarters raised_tail solo submissive submissive_male tail thick_thighs|12437460904