Porn star Stormy Daniels insists she didn't reveal incredibly intimate details of her alleged affair with Donald Trump in order to humiliate him.

The adult actress defended writing what she claims is an accurate description of the President's penis in her new book because it proves she is "telling the truth".

The x-rated star told BBC2's Newsnight : "Unless he's had a penis transplant then I'm pretty sure that's a checkmate."

Asked if she was trying to humiliate the president, she said Trump "attacked me first", adding: "I would never humiliate someone for no reason, or for any reason."

Stormy Daniels says she wasn't trying to humiliate Donald Trump
She says her knowledge of Trump's manhood proves she is telling the truth

Ms Daniels, whose real name is Stephanie Clifford, said she revealed the details "to prove that I was telling the truth".

She added: "I actually don't make it a habit to kiss and tell, part of me feels guilty about doing that.

"But by recounting every detail, I think it's obvious that I know things that only someone who had actually experienced and been there would know.

"And I would never have included any of those things, or kiss and tell for lack of a better explanation, if it wasn't for the fact that I was being called a liar."

The President denies having an affair with the porn star but admits she was paid hush money

Ms Daniels writes in her book Full Disclosure: "He knows he has an unusual penis. It has a huge mushroom head. Like a toadstool."

Trump has insisted he did not have an affair with the actress, but has admitted she was paid hush money.

Ms Daniels said people were quicker to discount and discredit her because of her job.

The adult actress likened Trump's penis to a toadstool

"They, for some reason, think that because of my job, I'm to be trusted less than someone who is perhaps like a schoolteacher or accountant.

"I'm very grateful to all the women who have stood up and supported me, but some of the nastiest comments I've gotten are from other women who think that I am not worth believing or that I'm inhuman because I work in the adult business.

"My job shouldn't have anything to do with my character."

Ms Daniels insisted the alleged encounter with Trump was consensual and not about money
She writes about the alleged affair in her new book, 'Full Disclosure'

Ms Daniels insisted the alleged encounter with Trump was consensual and not about money.

She said: "He mentioned something about a part on a TV show, it was never specifically said 'hey, if you have sex with me I will give you this', it wasn't anything like that.

"But it was definitely not a #metoo moment.

"And that's another really irritating thing, is when people think that I was either a prostitute or a victim: I was neither."