I mostly use the pretty.ai generator with "casual photo" as it's art style.
It does not always work, but you can add stuff to the prompt like natural lighting, photo taken with an iphone and so on, stuff that makes the ai know what you want. It not always work and the best way to get a good result is just to have one person in the picture but try it out, it's unlimited and free. Perchance also has a prompt generator, although I find that it uses too many words and it would be better if it tried to summarize what the user wants.
It is perchance. I don’t remember the prompt exactly but here’s something similar
“A full size back shot of a gay latin twink in his twenties with a gang tatoo on his back standing below a steamy shower. He is arching his back and spreading his cheeks to show his pink asshole. Water is dripping through his cheeks. Warm tone, pastel color-grading”