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Pressure grew today for Toby Young to be removed from a new universities watchdog after critics unearthed further crude and sexist writing from his past.

In magazine articles the writer admitted being a pornography “addict”, cast doubt on an actress’s complaint that she was coerced into sex acts, and commented on women’s breasts and bodies.

Shadow women and equalities minister Dawn Butler said the Prime Minister should cancel his appointment or stand accused of “wilfully rewarding misogyny, homophobia and bigotry”. Labour sources said they were “looking at every procedural opportunity” to raise the issue in the Commons when MPs return next week.

In a 2001 article for The Spectator magazine, called “Confessions of a Porn Addict”, Mr Young admitted he had seen “several thousand” pornographic films in his lifetime and mocked the idea that they were degrading to women. “On the contrary, the women in porn films are nearly always completely liberated beings,” he claimed.

He admitted watching the hardcore 1972 movie Deep Throat “several times” and dismissed its leading actress’s claims that she was “raped” for the film by arguing that she appeared unconcerned in the film.

“As someone who’s seen Deep Throat several times, I can report that it certainly doesn’t seem as though Marchiano — or Linda Lovelace, to use her nom de porn — is doing anything against her will.”

In a theatre review he enthused that “naked breasts” on stage appeared to belong to teenagers, writing: “They’re good breasts, too, belonging to women who don’t look a day over 18.”

In other pieces for The Spectator he boasted of his fiancée’s “tiny waist and huge knockers”, and complained about theatres that cast “dumpy, middle-aged actresses to play beautiful young women”.

Mr Young, a journalist who runs the New Schools Network charity, started this week as one of 15 members of the Office for Students, tasked with ensuring students get value for money.

The National Education Union, which represents half a million teachers and lecturers, has urged Education Secretary Justine Greening to fire him for “sexist and homophobic” behaviour.

Labour’s Ms Butler said: “Theresa May must reconsider and replace Mr Young with someone with genuine experience who treats people with dignity and respect.”

Controversy over the appointment has focused on Mr Young’s past remarks and social media posts, and an inaccurate Department for Education announcement that suggested he had taught at Cambridge and Harvard universities.

Critics highlighted his past social media posts, such as remarks on the “serious cleavage” of a woman MP, and a comment on a photo of him with a woman that he “had my dick up her arse”.

Business minister Margot James criticised him for “sexist comments”, and former Downing Street director of strategy Andrew Cooper warned of a “Tory values failure”.

In a 1,000-word response to critics Mr Young says he is a “supporter of women’s rights” and asked not to be judged on previous postings.