One in four 'watching porn' are women: Smartphones and 50 Shades of Grey said to be fuelling rise in popularity

Survey reveals more young women than ever are watching pornography

E.L. James' best-seller 50 Shades of Grey has been flagged as the reason

Women are most likely to watch porn on Mondays, according to website

Kim Kardashian is the most searched name on the site, PornHub

More young women than ever are watching pornography, a survey has revealed.

Almost one in four users logging onto the world's biggest porn site are women, with the under-35s said to be the biggest users.

They account for 24 per cent of the people watching films on the Pornhub site, which boasts 78 billion views of its videos.

One of the factors behind the rise is said to be the explosion in popularity of smartphones, with young women preferring to use their mobile devices to access the material.

X-rated: More young women than ever are watching pornography. Almost one in four users logging onto the world's biggest porn site are women, according to a PornHub survey

The study, which comes from the website's traffic and analytics data, found that 60 per cent of users watch pornography on their phone with just seven per cent on a tablet and 33 per cent on a computer.

It has also been fuelled by the popularity of the 50 Shades of Grey trilogy by E.L. James, which was dubbed 'mummy porn'.

The saga has sold more than 125 million copies worldwide and was turned into a film starring Jamie Dorman and Dakota Johnson.

According to data, Monday is by far the most popular day when women view the adult movies while Saturday is the least popular.

Overall, men and women aged under 35 account for 60 per cent of traffic to the site.

They usually start viewing after 11pm and watch for just under 10 minutes.

'Mummy porn': Dakota Johnson starring in the film adaptation of E.L. James' best-selling trilogy 50 Shades of Grey, which is believed to be behind the increase in young women logging on to watch pornography

Those in the older age bracket, 35 and upwards, prefer to start their viewing an hour earlier but stay logged on for an average of 11 minutes.

Reality star Kim Kardashian is by far the most searched name on the site.

Her sex tape video has been viewed more than 93 million times and remains the site’s most popular.

The 34-year-old has never looked back since the 2007 tape was ‘leaked’ onto the internet with her notoriety helping the Kardashian family land a reality show.

Now married to singer Kanye West, she posed nude for a magazine intending the ‘break the internet’ and garner the most number of page views.

Figures from Pornhub show that more people in Britain are accessing their site than anywhere else in Europe. Only America and Canada are ahead in terms of users.

More than a million Britons are estimated to be addicted to pornography, with as many as one in three women said to have a problem.

Quit Porn Addiction, the UK’s main porn counselling service, has revealed one in three of their clients are women.

HelpAddictions.org, Britain's first 24-hour counselling service for online pornography addiction, was launched last week.