David Cameron has told his favourite dirty joke - again.
It went something like this.
The joke is apparently an old favourite and was served up to Westminster correspondents at a dinner two years ago.
At the January 2014 event, he joked about himself, colleagues and rivals - including London mayor Boris Johnson.
I think we were in a south Hampstead suburb, during the mayoral election, and this very attractive, relatively middle-aged woman came to the door and said: "Boris, good to see you. Really lovely to see you. You are the father of one of my children."
And the white hair stood up on end and I remember the words that came out: “Cripes, Oh god, Oh cripes.”
This went on for about ten minutes.
She said: “Boris, you are the father of one of my children.”
And he said. “Do the media know? What is it? Is it money?”
She said: “No you’re the father of one of my children. I’m her maths teacher.”
The Conservative leader clearly has a fondness for this kind of thing, using his speech at the Conservative Party conference last year to make a joke about having sex with his wife Samantha - and taxes.
In an attack on Labour's economic policies, the Prime Minister targeted Jeremy Corbyn's economic adviser Richard Murphy. He told delegates:
His book is actually called 'The Joy of Tax'. I’ve read it. I took it home to show Samantha. It’s got 64 positions. And none of them work.
He's here all week etc.