French people's political stances have been tied to their sex habits in a revealing new survey.

A survey of 4,000 French nationals revealed that those with extreme political views are more likely to have threesomes and enjoy spanking and other dominant sex acts.

The information connecting sex and French politics was published by swingers networking group Wyylde just days ahead of the first round of the nation's presidential election.

When it comes to Marine Le Pen voters, the extreme right-wing electorate don't appear to go for conservative sexual behavior.

When it comes to Marine Le Pen (pictured) voters, the extreme right-wing electorate is more likely to experiment in dominant sex acts and practices from porn culture, including spanking

The far-right Le Pen voters, who are usually younger and less religious than the average French person, are more likely to experiment in dominant sex acts and practices from porn culture, including spanking.

The nationalist voters are seemingly less influenced by feminist culture and think less about symbolic violence in sex.

Meanwhile, those on the other end of the spectrum - the far-left - are more likely to have had a threesome.

Thirty-seven per cent of far-left voters, who would likely select Jean-Luc Mélenchon on the ballot, said they have participated in threesomes, while only 19 per cent of far-right have done so.

Only 13 to 15 per cent of those in the centre right and centre left respectively have taken part in a threesome.

The far-left voters were also far more likely to have been swingers at some point in their life, with 23 per cent admitting to sharing partners, compared to 12 per cent of the far-right saying the same.

It appears that voters with homosexual experiences are more widespread in the centre than the extremes.

Meanwhile, those on the other end of the spectrum on the far-left - who would likely select Jean-Luc Mélenchon on the ballot - are more likely to have had a threesome

Twelve per cent of men nationwide have had sex with another man, and among Emmanuel Macron voters the number is 16 per cent, compared to Francois Fillon voters, where the number is eight per cent.

Macron - who earlier in the campaign had to deny rumors he was having a gay affair - is married to his former school teacher Brigitte Trogneux, who is 24 years older than him.

The sex and politics survey also looked at the correlations between partners and politics, with the majority of people saying they had not had sex with someone supporting the far-right.

Sixty-two per cent of French people said they had not slept with someone supporting the far-right, while three-quarters of those surveyed said they were against the idea of dating someone with opposing political views.

Three-quarters of French people are also most likely to be partnered with someone who shares their politics, and most couples claim to share a political stance.

Only a third of couples who vote for different candidates claim to be 'very satisfied' with their sex life, while 40 per cent of couples who vote the same way were 'very satisfied'.

With French voters in a rebellious mood and many hesitant to the end about their choices, the identities of the two candidates who will progress to a winner-takes-all May 7 runoff remains anyone's guess heading into Sunday's first-round ballot.

Twelve per cent of men nationwide have had sex with another man, and among Emmanuel Macron voters the number is 16 per cent

With 11 contenders - from far-left to far-right - for the 47 million registered voters to choose from, the election is a high-stakes test for the European Union and for populist leaders who would tear it down.

Like Donald Trump in the United States, anti-establishment French populists Le Pen and Melenchon hope for an electoral electro-shock by surfing to power on voter disgust with politics as usual.

Failure by both to qualify for round two would signal a receding of the populist wave which crashed over the EU with Britain's 'Brexit' vote last year to quit the bloc.

The months-long French campaign has seemed to grow ever weirder and more uncertain as polling day approached.

A jobs-for-the-family financial scandal that punctured the Mr Clean image and campaign of one-time front-runner Fillon fueled the raging distrust between voters and their elected representatives.

The siren call of Le Pen's 'France first' nationalist rhetoric, and Melenchon's late surge, left Europe's second-largest country and third-biggest economy at a crossroads, with its future in the EU up for grabs.

Among Francois Fillon voters, eight per cent of his voters are men who have had sex with other men

The implosion of the ruling Socialist Party, with outgoing President Francois Hollande too unpopular to run again, and the stunning success of his former economy minister, Emmanuel Macron, with an upstart middle-way grassroots campaign without major party backing, threatened to dismantle postwar France's traditional left-right political divide.

By quitting Hollande's government to run as an independent, Macron also sucked away voters from the Socialist Party's candidate, Benoit Hamon.

Hamon's near-irrelevance in the election's closing stages, with his poll numbers in freefall, presented Socialist electors with the dilemma of whether to 'vote utile' - cast a useful vote for a candidate likely to make the second round - or waste it on Hamon's apparently doomed campaign.

In an Opinionway poll released on Thursday, it appeared that the election is still up in the air.

The pull expected Centrist candidate Macron to get 23 per cent in first round of french election, Le Pen 22 per cent, Fillon 20 per cent and Jean-Luc Melenchon 19 per cent.

The numbers suggested that Fillon would beat Le Pen in run-off vote by 57 per cent to 43 pe rcent if Fillon made it through to second round.

If Macron made it to the second round, the poll expects him to beat Le Pen in a run-off vote by 65 per cent to 35 per cent.