Rule34.GG

Regular ambiguous gender
animal genitalia
animal penis
brackenfur (warriors)
brightheart (warriors)
brother (lore)
brother and sister (lore)
cinderpelt (warriors)
cloudtail (warriors)
crookedstar (warriors)
cunnilingus
doggy style
domestic cat
duo
felid
feline
feline genitalia
feline penis
felis
fellatio
female
female/female
feral
from behind position
from front position
genitals
group
hawkfrost (warriors)
hi res
incest (lore)
leafstar (warriors)
lying
male
male/female
male/male
mammal
missionary position
on back
oral
penile
penis
sex
sibling (lore)
sister (lore)
squirrelstar (warriors)
tallstar (warriors)
tribadism
vaginal penetration
warriorcunt
warriors (book series)