The prime minister is now facing a ‘Bae of Pigs’ crisis, after a new book alleges he had carnal knowledge of a dead pig.

It’s not the sort of denial any world leader wants to make, and Prime Minister David Cameron has yet to respond to allegations that he once inserted his penis into the mouth of a dead pig.

The bizarre, and possibly illegal act, allegedly took place during the initiation for a debauched and secretive society at the University of Oxford. The lurid details are described in an extraordinary, unauthorized biography of the British prime minister written by the former deputy chairman of the Conservative Party.

Downing Street has refused to comment on the alleged indiscretion, which is being described as his “Bae of Pigs” crisis on Twitter.

Lord Ashcroft’s book also alleges that Cameron was a member of a “dope smoking group” called the Flam Club and repeats rumors that cocaine was allowed to circulate openly at the future prime minister’s home in London. Ashcroft, who gave more than $12 million to the party, accuses Cameron of appearing lazy and unreliable and says his own campaign chief described him as a “posh c***.”

Lord Ashcroft and co-author Isabel Oakeshott—former political editor of The Sunday Times—claim they were told about the pig’s head by “a distinguished Oxford contemporary” who also went on to become a Member of Parliament.

It was claimed that Cameron took part in an initiation ceremony to join the Piers Gaveston society, a notorious Oxford club that takes its name from the reputed gay lover of King Edward II. The magazine Tatler, Britain’s leading arbiter of the aristocracy, describes the group as Oxford’s “coolest” drinking society, with an annual summer party that is “basically a very well-organized orgy.” Hugh Grant was once a member.