The Pony Prayer©
All Pony Models use the 'Score' system, they have tagged their Training Images with scores according to the source image quality, with score_9 being the very best, and working down.
Using the Pony Prayer© - "score_9 score_8_up score_7_up score_6......" at the start of your Prompt guides the AI as to what quality Training Images to consider.
So, why not just use only "score_9", surely that would be best.
But that only limits the AI to a smaller amount of Training Images, by moving down the quality range more possible Training Images matching the Prompt Terms are also considered that might contribute to the final Image rendered.
Meaning there is a trade-off between Best Quality vs Most Variety of Source.
Low Scores may be included in the Neg's to reduce the chance that poor quality Training Source Images will be considered.
The Scores are sometimes referred to as the "Pony Prayer©" as they are recited before a Gen in the hope that the AI Gods will look favourably on your Prompt and render unto you a better Image.
Or you can ignore/omit the prayer and take your chances, it is not obligatory. (some folk never use it, and are happy enough with the results).
Note that the Pony Prayer© is only used for Pony Models, it has no meaning for other Models such as Sexy 1.0, SDXL or Flux. They just see it as "Empty Tokens". Adding or removing the Prayer to a Prompt in these other Models may seem to make a difference, but all it is doing is moving the other Prompt Words (Tokens) up or down the order and priority that the AI uses to process the Prompt, so any difference you see is just that some words further along in the Prompt may get different emhasis.
The Pony Prayer© for the best Sexy Images:
score_9, score_8_up, score_7_up, score_6_up, rating_explicit,
....Amen.
(The Images above have exact same Prompt, Settings, Seeds, - 1st with Prayer, 2nd without)
In community: the-prompt-lab