I would love to write the story of two porn stars meeting and falling in love. Ideally one of them would be an older star, someone famous in the industry while the other is just starting their career. I think exploring a relationship with power struggles, sex with multiple partners, and a mentor/mentee relationship would be amazing. On top of that, the story would be able to handle the shift in power and position between the two, with the experienced porn star losing their moment in the spot light while the newer star becomes more and more famous.
Would their relationship crumble as they find their roles reversed? Was the newer star only attracted to the older one to benefit their career? Or could the older star stand the fact that they are being forgotten and that younger partners are now giving their lover things they can no longer give.
I have never written a story with a complete shift in power dynamics, but that is my ultimate goal for a great story.