Orgasm competition IM

I'm looking for a relatively specific roleplay however I'm open to ideas as well. This is a sex fight and the plot would involve two characters who are competitively trying to make the other one orgasm first or racing to, something like that. They can be lovers, friends, enemies etc. Pm me for details and we can discuss pairings.

Girls only please.

Also I prefer IM roleplaying and good detailed scenes.