Back in 2003, the Troubador wrote the beginning of a story: "How High a Price." If you haven't read it, you should... and the many endings already suggested by various and sundry. ----- My ending(s) are short and a bit different.
A mysterious, sophisticated married woman discovers she needs to take a lover to have great orgasms. She needs the excitement of two men to bring her to her sexual peak. She is delicious enough that she manages to pull it off, reveling in the thrill of even making her husband eat her creampies without realizing it.
Casimir wants nothing so much as a relationship with a woman. The problem is that all of his sexual experience so far has been with men. Then he sees an interesting personal ad in the paper. The woman implies that she's looking for anal sex. Now THAT Casimir knows a few things about. But there could be trouble ahead...
Greg is a geeky IT worker who lusts after Kathy, a sexy coworker in sales. Greg finds something interesting in an email and ends up having to take a chance to get what he wants.