I didn't really find this concept in this (or other) website.

Basically is a woman lying on her stomach on .. well, where do you want .. giving an oral sex to a man, her hands are positioned on her ankles and the rest is up to your imagination.

Do you want man's hand resting on the back of her head? no problem! ;)

Do you desire some sloppiest things? Right! Smeared makeup is your keyword!

Do you want her over a bale of hay in your ranch? no problem!

Even a simple prompt like:

"woman, lying on her stomach, oral sex."

Can give good results (as you can see from two random preview images).

As usual, the preview images are not cherry picked ;)