Here’s a thought for a story.  A woman wakes up after a hard night of partying and finds herself locked in a chastity belt and chastity bra.  Fun times, right?  Only problem is she doesn’t know who’s got the keys.  It could be like a detective story.  Make her smart (smart women are incredibly sexy) but her increasing desperation would prove an excellent foil as she struggles to piece together who the key holder is.  As she talks to people from the party she puts together the clues and slowly comes to realize what happened.

Of course, one (or more) of the people she talks to is lying.