Personally I think subforums are one of the worst ever things to be put on a piece of forum software and should only be used for something that is a read once only topic that once read the user never needs to go into again.
Just my opinion
Why is Serious Discussion a seperate forum and not a sub of The Lounge ?
Two sperms are having a race, one sperm says, "My arms are killing me with all this swimming, how much further is it to the womb?"
The second sperm says, "Fuckin ages yet, we've only just gone past her tonsils!!