Implicating anthro_penetrating_human → anthro
Link to implication

Reason:

For an image in a post to depict an anthro character penetrating a human one, both an anthro character and a human character must be present and identifiable in the image; thus, anthro_penetrating_human being applicable to a post implies that both anthro and human are applicable to the same post. If the latter is not the case, then anthro_penetrating_human shouldn't be on the post.