I'm interested in stories about ordinary women finding their way into more wild lifestyles. Cliche and common? Probably.
To be more specific, the stories by Stormbringer on this site are up there. They have an interracial element, and that adds an extra element of ordinary women falling into taboo behavior but its not necessary.
Another story that I like in this model is Surprises by rflj, about a girl wondering into a swap party and getting drawn into the swinger lifestyle.