No trigger word used directly but tongue job is common in all. I recommend focusing on the action describing the subject with the concept related words. Some nsfw words included in the train set such as: ???, ???????, tongue job etc.

Here’s an example prompt I used in some of these generations—feel free to alter it heavily:

A woman is performing a tongue job on a circumcised, ????? ?????. She is licking the head of the penis.