1futa 2016 animal_genitalia balls black_balls black_penis blush closed_eyes colored comic day detailed_background embarrassed equine equine_penis erection feathered_wings feathers feral fluttershy_(mlp) friendship_is_magic furry futa_only futanari gradient_background heart hi_res huge_balls huge_penis looking_away looking_down looking_pleasured mammal masturbation my_little_pony nude open_mouth outside pegasus penile_masturbation penis pink_background simple_background sitting skoon solo spread_legs spreading tree two-handed_masturbation wings worried