Rule 34 Dev - 2013 2futas alpha_channel animated buttjob chacomics cutie_mark equine erection friendship_is_magic furry futa_only futanari futanari_on_futanari futanari_with_futanari gif hair horn horse horsecock hot_dogging loop multicolored_hair my_little_pony open_mouth penis pink_fur pink_hair pinkie_pie plain_background pony purple_hair source_request teeth tongue tongue_out transparent_background twilight_sparkle unicorn yuri|347760