David Cameron used his speech to the Conservative Party conference 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.
"We live in a country where the main opposition party – let’s not forget, the alternative government – believes in nationalising industries without compensation, jacking up taxes to 60 per cent of people’s income, and printing money," he said.
"There’s an academic called Richard Murphy. He’s the Labour Party’s new economics guru, and the man behind their plan to print more money.
"He gave an interview a few weeks ago. He was very frank. He admitted that Labour’s plan would cause a 'sterling crisis', but to be fair he did add, and I quote, that it 'would pass very quickly'.
Cameron added: "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."
David Cameron stands onstage with wife Samantha following his keynote speech to delegates.
While everyone was recovering from that. Cameron dropped in another off-script sex joke about rugby. "I was a hooker," he told activists. "And by the way that is a factual statement not a chapter of Michael Ashcroft’s book."
Commentators on Twitter watching the speech were surprised and horrified in equal measure.
David Cameron Addresses The 2015 Conservative Party Conference
David Cameron Addresses The 2015 Conservative Party Autumn Conference(01 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron stands onstage with wife Samantha following his keynote speech to delegates on the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron has announced plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Dan Kitwood/Getty Images) (credit:Dan Kitwood via Getty Images)
BRITAIN-POLITICS-CONSERVATIVE(02 of28)
British Prime Minister David Cameron (R) stands by his wife Samantha after delivering a speech to delegates at the annual Conservative Party Conference in Manchester, north west England, on October 7, 2015. Prime Minister David Cameron will today call for a building 'crusade' in Britain, in a bid to address a housing shortage that has become a political hotcake. AFP PHOTO / PAUL ELLIS (Photo credit should read PAUL ELLIS/AFP/Getty Images) (credit:PAUL ELLIS via Getty Images)
BRITAIN-POLITICS-CONSERVATIVE(03 of28)
Samantha Cameron, the wife of British Prime Minister David Cameron, listens as her husband addresses delegates on the final day of the annual Conservative Party Conference in Manchester, north west England, on October 7, 2015. Prime Minister David Cameron will today call for a building 'crusade' in Britain, in a bid to address a housing shortage that has become a political hotcake. AFP PHOTO / OLI SCARFF (Photo credit should read OLI SCARFF/AFP/Getty Images) (credit:OLI SCARFF via Getty Images)
BRITAIN-POLITICS-CONSERVATIVE(04 of28)
British Prime Minister David Cameron (R) waves by his wife Samantha Cameron on stage after delivering a speech to delegates at the annual Conservative Party Conference in Manchester, north west England, on October 7, 2015. Prime Minister David Cameron will today call for a building 'crusade' in Britain, in a bid to address a housing shortage that has become a political hotcake. AFP PHOTO / OLI SCARFF (Photo credit should read OLI SCARFF/AFP/Getty Images) (credit:OLI SCARFF via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(05 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron stands onstage with wife Samantha following his keynote speech to delegates on the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron has announced plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Dan Kitwood/Getty Images) (credit:Dan Kitwood via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(06 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron stands onstage with wife Samantha following his keynote speech to delegates on the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron has announced plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Dan Kitwood/Getty Images) (credit:Dan Kitwood via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(07 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron stands onstage with wife Samantha following his keynote speech to delegates on the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron has announced plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Christopher Furlong/Getty Images) (credit:Christopher Furlong via Getty Images)
BRITAIN-POLITICS-CONSERVATIVE(08 of28)
British Conservative party member of parliament and London Mayor Boris Johnson (C) receives a standing ovation from delegates after receiving a complimentary mention in Prime Minister David Cameron's speech on the final day of the annual Conservative Party Conference in Manchester, north west England, on October 7, 2015. Prime Minister David Cameron will today call for a building 'crusade' in Britain, in a bid to address a housing shortage that has become a political hotcake. AFP PHOTO / OLI SCARFF (Photo credit should read OLI SCARFF/AFP/Getty Images) (credit:OLI SCARFF via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(09 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron gives his keynote speech to delegates on the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron has announced plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Dan Kitwood/Getty Images) (credit:Dan Kitwood via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(10 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron gives his keynote speech to delegates on the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron has announced plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Christopher Furlong/Getty Images) (credit:Christopher Furlong via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(11 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron gives his keynote speech to delegates on the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron has announced plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Dan Kitwood/Getty Images) (credit:Dan Kitwood via Getty Images)
U.K. Prime Minister David Cameron Delivers His Speech On The Closing Day Of The Conservative Party Conference(12 of28)
David Cameron, U.K. prime minister and leader of the Conservative Party, delivers his speech on the closing day of the Conservative Party annual conference in Manchester, U.K. on Wednesday, Oct. 7, 2015. Cameron will set out changes to planning rules to encourage house-builders to deliver more of the homes for young people that his government has promised. Photographer: Simon Dawson/Bloomberg via Getty Images (credit:Bloomberg via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(13 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron gives his keynote speech to delegates on the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron has announced plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Dan Kitwood/Getty Images) (credit:Dan Kitwood via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(14 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron gives his keynote speech to delegates on the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron has announced plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Dan Kitwood/Getty Images) (credit:Dan Kitwood via Getty Images)
BRITAIN-POLITICS-CONSERVATIVE(15 of28)
British Prime Minister David Cameron smiles as he delivers a speech to delegates at the annual Conservative Party Conference in Manchester, north west England, on October 7, 2015. Prime Minister David Cameron will today call for a building 'crusade' in Britain, in a bid to address a housing shortage that has become a political hotcake. AFP PHOTO / OLI SCARFF (Photo credit should read OLI SCARFF/AFP/Getty Images) (credit:OLI SCARFF via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(16 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron gives his keynote speech to delegates on the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron has announced plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Dan Kitwood/Getty Images) (credit:Dan Kitwood via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(17 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron gives his keynote speech to delegates on the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron has announced plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Dan Kitwood/Getty Images) (credit:Dan Kitwood via Getty Images)
BRITAIN-POLITICS-CONSERVATIVE(18 of28)
British Prime Minister David Cameron delivers a speech to delegates at the annual Conservative Party Conference in Manchester, north west England, on October 7, 2015. Prime Minister David Cameron will today call for a building 'crusade' in Britain, in a bid to address a housing shortage that has become a political hotcake. AFP PHOTO / OLI SCARFF (Photo credit should read OLI SCARFF/AFP/Getty Images) (credit:OLI SCARFF via Getty Images)
BRITAIN-POLITICS-CONSERVATIVE(19 of28)
British Prime Minister David Cameron (R) and wife Samantha arrive at the annual Conservative Party Conference in Manchester, north west England, on October 7, 2015. Prime Minister David Cameron will today call for a building 'crusade' in Britain, in a bid to address a housing shortage that has become a political hotcake. AFP PHOTO / PAUL ELLIS (Photo credit should read PAUL ELLIS/AFP/Getty Images) (credit:PAUL ELLIS via Getty Images)
U.K. Prime Minister David Cameron Delivers His Speech On The Closing Day Of The Conservative Party Conference(20 of28)
David Cameron, U.K. prime minister and leader of the Conservative Party, right, arrives with his wife Samantha Cameron, to deliver his speech on the closing day of the Conservative Party annual conference in Manchester, U.K. on Wednesday, Oct. 7, 2015. Cameron will set out changes to planning rules to encourage house-builders to deliver more of the homes for young people that his government has promised. Photographer: Simon Dawson/Bloomberg via Getty Images (credit:Bloomberg via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(21 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron and wife Samantha arrive for the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron is expected to announce plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Dan Kitwood/Getty Images) (credit:Dan Kitwood via Getty Images)
U.K. Prime Minister David Cameron Delivers His Speech On The Closing Day Of The Conservative Party Conference(22 of28)
David Cameron, U.K. prime minister and leader of the Conservative Party, right, arrives with his wife Samantha Cameron, to deliver his speech on the closing day of the Conservative Party annual conference in Manchester, U.K. on Wednesday, Oct. 7, 2015. Cameron will set out changes to planning rules to encourage house-builders to deliver more of the homes for young people that his government has promised. Photographer: Simon Dawson/Bloomberg via Getty Images (credit:Bloomberg via Getty Images)
U.K. Prime Minister David Cameron Delivers His Speech On The Closing Day Of The Conservative Party Conference(23 of28)
David Cameron, U.K. prime minister and leader of the Conservative Party, right, arrives with his wife Samantha Cameron, to deliver his speech on the closing day of the Conservative Party annual conference in Manchester, U.K. on Wednesday, Oct. 7, 2015. Cameron will set out changes to planning rules to encourage house-builders to deliver more of the homes for young people that his government has promised. Photographer: Simon Dawson/Bloomberg via Getty Images (credit:Bloomberg via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(24 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron and wife Samantha arrive for the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron is expected to announce plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Dan Kitwood/Getty Images) (credit:Dan Kitwood via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(25 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron and wife Samantha arrive for the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron is expected to announce plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Christopher Furlong/Getty Images) (credit:Christopher Furlong via Getty Images)
BRITAIN-POLITICS-CONSERVATIVE(26 of28)
British Prime Minister David Cameron (L) and wife Samantha arrive at the annual Conservative Party Conference in Manchester, north west England, on October 7, 2015. Prime Minister David Cameron will today call for a building 'crusade' in Britain, in a bid to address a housing shortage that has become a political hotcake. AFP PHOTO / OLI SCARFF (Photo credit should read OLI SCARFF/AFP/Getty Images) (credit:OLI SCARFF via Getty Images)
David Cameron Addresses The 2015 Conservative Party Autumn Conference(27 of28)
MANCHESTER, ENGLAND - OCTOBER 07: British Prime Minister David Cameron and wife Samantha arrive for the fourth and final day of the Conservative Party Conference, at Manchester Central on October 7, 2015 in Manchester, England. Mr Cameron is expected to announce plans to encourage developers to build 200,000 new 'affordable' homes for first time buyers. The initiative is set up to secure the homes by the end of the parliament, and is one of the key election pledges of the Conservative's election campaign. (Photo by Christopher Furlong/Getty Images) (credit:Christopher Furlong via Getty Images)
U.K. Prime Minister David Cameron Delivers His Speech On The Closing Day Of The Conservative Party Conference(28 of28)
George Osborne, U.K. chancellor of the exchequer, left, and Sajid Javid, U.K. business secretary, listen to David Cameron, U.K. prime minister and leader of the Conservative Party, deliver his speech on the closing day of the Conservative Party annual conference in Manchester, U.K. on Wednesday, Oct. 7, 2015. Cameron will set out changes to planning rules to encourage house-builders to deliver more of the homes for young people that his government has promised. Photographer: Simon Dawson/Bloomberg via Getty Images (credit:Bloomberg via Getty Images)