Rule 34 Dev - animal_genitalia animal_penis anthro armband balls big_penis bracelet brown_body brown_fur brown_hair butt collar comparing comparing_penis duo equine_genitalia equine_penis eyebrows frottage fur genitals green_eyes hair horn jewelry looking_at_viewer male male/male musclegut muscular muscular_anthro muscular_male nipples pecs penile penis penis_size_difference pinned pinned_to_ground red_hair scales sex spiked_armband spiked_bracelet spiked_collar spikes thick_eyebrows thick_penis yellow_body yellow_scales frohti mario_bros nintendo bowser hubristhehorse equid equine horse koopa mammal scalie hi_res|18733150240