Queensland Premier Annastacia Palaszczuk has slapped down One Nation's claims that teachers are showing children sex tricks in the classroom as "absolutely atrocious" and untrue.

The stunning allegations came from the party's Queensland leader Steve Dickson as he tried to defend his party's domestic violence policy and its promise to abolish the Safe Schools program, if elected.

"One Nation is about protecting the whole family unit," he said.

"And that takes me onto another note — the controversial Safe Schools program in Queensland.

"We are having little kids in grade four at school, young girls being taught by teachers how to masturbate, how to strap on dildos, how to do this sort of stuff — that is the real problem in this country."

The remarks came a day after One Nation refused to dump a candidate over derogatory jokes about sex and domestic violence, made on the candidate's sex-shop Facebook page.

An angry Premier described the comments as "absolutely atrocious".

"That is rubbish, that is complete nonsense," Ms Palaszczuk said.

"I'm lost for words, I'm actually lost for words that someone would dare say such things that are simply and utterly not true.

"I have spoken to the Education Minister and Safe Schools is not taught in the classroom.

"Support is given to teachers and families."

Sorry, this video has expired Pauline Hanson on Friday shut down questions over her candidate's sex shop.

One Nation backs candidate after Facebook sex shop posts

Mark Thornton, the One Nation candidate for Thuringowa, owns Cupids Cabin Adult Shop in Townsville.

He was caught out yesterday dismissing posts about graphic sex and domestic violence as "probably [coming] back to your 50 Shades of Grey type".

The site also made crude jokes about oral sex.

The Facebook page run by Mr Thornton's partner has now been taken down.

Mr Thornton's Townsville adult shop. ( Facebook: Cupids Cabin Adult Shop )

One Nation's federal leader senator Pauline Hanson reiterated her support for Mr Thornton at the same press conference.

"He has not put the posts up online personally," she said.

"We are actually standing by Mark, he is not going to be disendorsed.

"He is standing under the banner of One Nation at the next election."

She would not be drawn on whether the posts were offensive, while insisting the Safe Schools program was "rubbish".

"So deal with that first before you come asking me questions about a registered business.

"How many times have I turned on my TV at night on SBS and seen the porn that is on that site and you are talking about this on a website?"

Nicholls refuses to be drawn on sex shop

Buderim MP Steve Dickson went on to liken the Cupids Cabin business to a newsagency which can sell Playboy-style magazines.

"These are legal legitimate businesses and that is what Mark's partner is involved in," he said.

"You can try to take that to wherever you like but One Nation is about the family unit.

"It is about looking after the people of Queensland and abolishing the Safe Schools program. And no other party will do that."

LNP leader Tim Nicholls would not be drawn into the issue.

When asked if there was anything wrong with owning an adult shop, the Opposition Leader said it was an issue for One Nation, quickly switching to a hard sell on his small business policy instead.

"Let me say though around small businesses, small businesses will do better under an LNP government with our payroll tax cut, with our action for cheaper electricity," he said.

"I will let Pauline Hanson deal with her candidates."

He also rejected claims it was a "bad look" to have the LNP now preference One Nation in most seats.

"Those cards are now registered," he said.