An Australian university will allow a controversial sex therapist to speak on campus despite her opinion that the sexual assault and rape crisis at universities around the country is a 'myth'.

La Trobe University barred Bettina Arndt from presenting at an event organised by the Liberal Club due to her views.

The university backflipped on their ban on Wednesday but have told the Liberal Club that they will have to pay for extra security.

Sex therapist and psychologist Bettina Arndt (pictured) was banned from speaking at a La Trobe University event before the university backflipped on Wednesday

Mrs Arndt controversially argued that the rape crisis on Australian university campuses is a myth (pictured: Mrs Arndt's Twitter)

The August 14 event for 100 people may struggle to go ahead as the club fears they will be unable to afford the imposed security costs, The Australian reported.

The sex therapist and psychologist had criticised a report by the Human Rights Commission that suggested sexual harassment was endemic to Australian campuses.

Mrs Arndt is anticipated to question whether there is a rape crisis on campus by suggesting the report showed 'hardly any rape and only a lot of unwanted staring.'

The university allegedly wanted to ban the event as its message doesn't align with the university's campaign to remove sexual violence and harassment from campus.

A La Trobe University spokesperson said: 'The uni has put a lot of effort into (implementing changes recommended in the Human Rights Commission report) and what we're trying to do is create an environment on campus that's safe, respectful and inclusive.

'And while there were some concerns in some ­pockets about the event, we also prize free speech and we're big enough to include a diversity of opinions in our discussions.'

The university had initially barred Mrs Arndt from presenting because her opinions did not align with La Trobe's campaign to end sexual violence on campus

Mrs Arndt wrote an article on her website in response to La Trobe's intention to band her presentation.

She addressed that the event she was 'belatedly' accepted to may not go through due to security costs, but maintained her stance on the issue.

'Lying to young women about their safety is a sorry start to higher education for our bright young women,' Mrs Arndt wrote.

Students from the Liberal Club were disappointed in La Trobe's attempt to ban their chosen speaker.

'I'm ashamed (the university's) first instinct is to censor us and the first reaction is to stamp (controversial ideas) out rather than letting open debate happen,' said James Plozza, president of the La Trobe University Liberal Club.

Plozza said that they've been mucked around by the university, which is making it difficult for them to host the event.

