4:3
all_fours
animal_genitalia
animal_penis
anthro
anus
backsack
balls
biped
black_hair
butt
equid
equine
equine_genitalia
equine_penis
erection
genitals
grey_hair
hair
hooves
horse
male
mammal
nude
penis
presenting
presenting_hindquarters
solo
tail
unknown_artist
