Rule 34 Dev - 2013 abstract_background anal anal_sex anus balls big_balls big_penis blue_eyes cutie_mark disembodied_penis duo equine erection fan_character feathered_wings feathers female fur grey_fur grey_hair hair hi_res male mammal my_little_pony nude pegasus penetration penis severus simple_background solo_focus stormfront straight wings|2736628664