So I've noticed ass_to_mouth is pretty undertagged. I try to tag it when I see it, but I'm often unsure of whether it's applicable. There are some situations where it's unambiguous, e.g. when there's a cum string from the ass to the mouth or it's a part of a comic. But often it's less clear. Here are the main situations I'm unsure of:
1. One character has cum in their ass and is fellating the other character. It's possible that there's an offscreen character that came in the first character's ass, but does Occam's razor apply? Example:
post #1515076
This one's less clear because there are three characters:
post #301200
2. There are multiple scenes that are not in a clear chronological order but may imply ass_to_mouth depending on how you read them:
Thoughts?
Updated