https://civitai.com/models/95395/rimjob-anilingus-from-behind
Trigger: rimjob, 2girls, looking back, licking, from behind
These are the tags that more or less should always be in the prompt. You can also make use of the negative prompt to help with the gender of the characters.
This lora works best with square aspect ratio (512x512), then with landscape (768x512) and lastly with portrait (512x768), due to the dataset used. I added separate examples with other aspect ration in the image gallery.
