I was thinking about role-play today, and started noting some of the elements that can be combined into a sexy scenario. Here's a provisional list.
Active and Passive. Who's driving the encounter to consummation?
Reluctant and Keen. Who wants the consummation and who needs to be drawn out. Not necessarily the same as Active/passive
Novice and Experienced. Is this the first time for our hero/heroine?
Need and Desire. Is there an external non-sexual need or an internal sexual desire driving the encounter?
Forbidden. Is the desire in play forbidden fruit?
Trading. Will trade sex for ?
Coercion. What hold does the Active party have over the Passive?
Circumstantial. What has happened in the world to throw our role-players together?
Seduction. What lures the Passive player to the Consummation?
Obviously combining these elements opens many possibilities …