BUR #53283 is pending approval.
create implication horse_dildo -> animal_dildo
create implication dog_dildo -> animal_dildo
create implication knotted_dildo -> animal_dildo
There is an umbrella tag of animal penis but no animal dildo yet, and I don't see why it shouldn't exist.
I have beast-related stuff blacklisted and want to include the dildos. You can't tag images with animal dildos as animal penis due to the implication of penis, so hopefully this works.