Rule 34 Dev - 1:1 alicorn ambiguous_penetration blush clenched_teeth closed_eyes cold-blooded-twilight duo equid equine female female_penetrated feral feral_on_feral feral_penetrated feral_penetrating feral_penetrating_feral friendship_is_magic ftm_crossgender fur futanari hair hasbro hi_res hooves horn intersex larger_female male male/female male_penetrating male_penetrating_female mammal my_little_pony mythological_creature mythological_equine mythology penetration penile penile_penetration penis princess_celestia_(mlp) quadruped rule_63 sex side_view simple_background size_difference tail teeth text twilight_sparkle_(mlp) wings|13831825504