I don't stop scenes for crying ever. We have safe words. Plus, bodies are bodies. Some toilets' eyes water from smell and taste. Some toilets get piss in their eyes. Crying isn't abnormal.

However, I have never had a toilet cry and give me consent to do forced consumption to completion. Realistically, it is a liability. I also don't want my toilets to projectile vomit my own shit on my face (it has happened). It is important to pay attention to the toilet's body language and adjust intensity accordingly. I can still have a really intense scene even without forced consumption. On the other hand, almost every forced consumption scene I have done results in regret. I get comments after the scene that they wished they had listened to my advice that my shit is just too large to fully consume.