Rule 34 Dev - anthro armbinder binder_(restraint) bit_gag bondage_gear chains chastity_cage chastity_device equid equine forced_exercise forced_trotting gag hands_behind_back hi_res hooves horse joey_(summerlong) male male_focus male_only mammal monoglove restraints slave solo story story_in_description stripedcrocodile treadmill|11421334208