rule 34 2019 ambiguous penetration black hair blush cutie mark dialogue digital media artwork duo english text equid equine evehly feathered wings feathers female female penetrated feral fluttershy mlp friendship is magic from behind position hair hi res king sombra mlp long hair looking pleasured male male penetrating mammal my little pony one eye closed open mouth penetration penis pillow pink hair pterippus sex simple background straight text white background wings 3189449