If this guy is any indication it's not so much that the crowd at this "Pure by Choice" rally chose abstinence, but rather that abstinence chose them.
The link on the coliseum site is broked, so here is the real deal.
What is odd is that on the list of reasons that drove these pure souls to preserve their virginity is that they will avoid a broken heart. Which is weird, because it seems that these purity folks go out of their way to show that love does not equal sex, yet here, they say that by avoiding sex, you avoid a broken heart. And it seems to me that virgins could just as easily have their hearts broken- if not by a sex partner than by the many gritty and painful realities the world has to offer.
Additionally, it seems that only virgins have the capability to "be honest." I know this for a fact to be untrue. John Ashcroft is the least honest person I have ever seen.