So there is also this angle often used by "true anal" and Adriano. The man the legend.

It has quite the "implied sex" theme to it.

Use landscape format.

The girls in the training data are having quite the big butts. So get ready for a bit of chubby asses. I tried to conter-prompt it by "slender woman"

Strength: 1.0

Prompts that worked for me:

image shows one girl and only one man. The girl has a slender body and is on all fours gripping the backrest of a couch to the camera. The man is standing behind her at her butt and is having sex with the girl from behind. the girl looks into the camera. The camera angle is slightly from above. Her buttocks are visible. the man is gripping her hips, while her fucks her from behind. the face of the man is out of frame and not visible.

The photograph depicts an explicit sexual scene featuring a woman and a man. She is on all fours on a couch. A man, whose face is not visible, is standing behind her, penetrating her from behind. The woman's buttocks are prominently displayed.

she has shiny buttocks.

the man wears black gloves.