The detailed nature of the revelations concerning Mark Oaten are said to be so disgusting that not even the News of the Screws will print them.
That of course has not stopped a few jokes doing the rounds that moreorless give the game away.
This one is far too filthy to reproduce on a family-orientated blog (?) but if you're into Lib Dem toilet humour you can read it here.
When this story first broke I didn't think Oaten should quit as MP, but I would now take the view that Oaten's credibility is blown to such an extent that if the Lib Dems want to hold the seat, they should find a new candidate.