A Christian meme virus like the WWJD bracelets. It seems to have peaked and started to fade again, thankfully. True love waits.. feh. If you want to wait, for religion, for personal reasons, whatever that's great, but don't imply that the rest of us can't have true love becuase we happen to like sex. It's not like Christianity has a monopoly on love.

But true love waits... No it doesn't, dammit! Love is now, and marriage is only a distant blip on the farthest horizon. Live for today, do what you want, and deal with tomorrow when it comes. The loudest proponents of "true love waits" are the ones who have never had to decide whether they want to fuck like bunnies or not.
See: you've never had sex in your life