Rule 34 Dev - animal_genitalia animal_penis black_penis brother brother_and_sister deepthroat deepthroat_training duo english_text equine equine_penis erection fellatio fellatio_from_feral female feral fishy-pony fishypony forced forced_oral friendship_is_magic fur hair half-closed_eyes hi_res horn horsecock incest inside male male_on_feral male_penetrating mammal markings measuring_penetration_depth multicolored_hair my_little_pony neck_bulge open_mouth oral oral_penetration oral_sex pen penetration penis purple_fur purple_hair sex shining_armor_(mlp) sibling sister straight text throat_barrier throat_bulge tongue tongue_out twilight_sparkle_(mlp) two_tone_hair unicorn white_fur|3104302568