2013 blue_fur blush brown_hair cowgirl_position cutie_mark donkey duo equine female female_on_top friendship_is_magic fur grey_fur hair horse legwear lying male mammal multi-colored_hair my_little_pony necktie on_back on_top open_mouth pegasus penetration penis pony purple_eyes pussy rainbow_dash rainbow_dash_(mlp) rainbow_hair rico-cake ricocake sex stockings straddling straight tongue vaginal vaginal_penetration wings