Rule 34 Dev - animal_genitalia black_penis blush brother brother_and_sister duo english_text equine erection female fishy-pony friendship_is_magic fur furry hair half-closed_eyes horn horse horsecock incest inside licking looking_at_penis male mammal markings multicolored_hair my_little_pony open_mouth oral pen penis penis_lick pony precum purple_fur purple_hair sex shining_armor_(mlp) sibling sister smile straight text tongue tongue_out twilight_sparkle_(mlp) two_tone_hair vein veiny_penis white_fur|2004314392