2017 alicorn blush crystal cum cum_on_face duo equine erection feathered_wings feathers female feral friendship_is_magic hair hi_res horn human human_on_feral humanoid_penis inside interspecies looking_at_viewer male mammal multicolored_hair my_little_pony penis purple_feathers shutterflyeqd smile straight twilight_sparkle_(mlp) unicorn_horn wings zoophilia