2014 anthro anthrofied ass balls breasts closed_eyes comic dickgirl duo equine female friendship_is_magic fur furry futanari hair horse horsecock_futanari intersex mammal my_little_pony nipples penetration penis pink_fur pink_hair pinkie_pie_(mlp) pony purple_fur purple_hair pussy sex slypon straight_hair twilight_sparkle_(mlp) vaginal_penetration