There seems to be a distinct shortage of butt stuffing action that involves receiver lying face down / prone on teh interwebz.

Hopefully, this might help.

It's not flawless by any means, but my excuse is that the source material is really hard to come by.

DoRA can generally handle two variants:

• receiver lying down on an elevated surface with the giver standing next to them, and

• both giver and receiver being on the same surface, with the giver kneeling.

The DoRA is clearly overheated, so use the weight of 0.75 or thereabouts. Have a look at the sample gallery for the structure of prompts which kinda matters since we're dealing with multiple people in different poses.

Some models are not very forthcoming with direct generation, but all seem to work just fine if you first generate with a model that works well - Analog Madness and Realistic Vision both seem to be, and then use img2img with the different model but the same prompt. Some of the sample images are like that, not sure how that shows up in metadata.