Well, a Sex Forum would be a terrible idea. Firstly, with about 80% or more of the members here being admitted virgins, I don't know how much contributory discussion could be made. The age range, not to mention the maturity range of most of the members at times, even me for that matter, would make a mockery of that forum.
I agree with Adrena too, that personal issues should be kept off the internet. Maybe we should make a "What Would You Do" type of Forum.
That way, we could propose hypothetical situations, as well as flat out outlandish situations people could be in to get advice with. It could be serious, as well as just fun and funny to read too!
Just an idea though to make something a little more creative. This could even incorporate James idea of Creative Writing without secluding it to just that. Creativity, humor, and real situations (although only the poster would really know) would all be involved.
Or maybe a "Court Forum" where the moderators are the judges and decide the outcome over disputes either occurring in someones real life or in a case they heard in the news, on the radio, or just made up! Lets make it something that can be fun and messed around with, but not something that will get out of hand either.