This one is OK, but Hunyuan definitely understands what a penis is supposed to look like a bit better. I would recommend putting "tongue, tip" at the beginning of the negatives, or you'll get some weirdly long tips of penises a lot of the time. I included a sample workflow in the training images download if you want to see how the preview images were generated.
This was trained on 4 different angles, here is how to trigger them:
A woman is lying on her stomach between the legs of the viewer and performing oral sex on a man. Her head moves up and down as she sucks the penis.
An overhead view of a woman kneeling between the legs of the viewer and performing oral sex on a man. She moves her head back and forth as she sucks the penis.
A woman is leaning over a man positioned in between the legs of the viewer and performing oral sex on a man. Her head moves up and down as she sucks the penis.
A woman is kneeling in between the legs of the viewer and performing oral sex on a man. Her head moves up and down as she sucks the penis.