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anus big_butt book butt cutie_mark equid equine female feral friendship_is_magic genitals glistening glistening_body hair hasbro horn inside lawlessdraws light light_beam lighting looking_back lying mammal my_little_pony mythological_creature mythological_equine mythology on_side pink_body purple_eyes purple_hair shaded simple_shading solo sunbeam sunlight tail twilight_sparkle_(mlp)unicorn unicorn_horn vulva window