Always made me smile when he finished off a debate with the "We've barely got our trousers off" line.

Did he do this often?

I was only aware of him using this turn of phrase when debating O'Reilly ("We barely got our trousers off, we should pursue this.")

[youtube link taken down by Fox News, sorry]

Here's another time: http://www.youtube.com/watch?v=Pm3whAxMgdc. I'm pretty sure I've heard him use it a few times.