I have an inkling of an idea for a story involving an older male character - probably somewhere between 40 and 50 years old - and a female about half his age. It's something I've never done before, would be interested in doing with the right person. I also think the idea could make for a rather entertaining romance.
The idea is that the male character, recently divorced and going through something of a crisis, travels from the US to some clichéd romantic European city. After a little while, he meets another American, a young and lovely African-American woman. As far as he's concerned, she's far too young, and not his type even if she'd been closer to his age. But all the same, the two get along quite well, and he is, after all, there to get away from his life for a while.
What he doesn't know is that she is a pornstar, either there on vacation or shooting a movie but either way someone who fucks people on film for a living. Not the nice, half-way decent stuff, either. She's been called every name in the book, been spat on and slapped and made to gag. But, as he learns, she's far from the stereotypical, shallow airhead.
And there you have the basics. If it sounds interesting, please send me a message, and we'll see if we can't work something out!