10% of Britons are in a polyamorous relationship, according to Sunday's Valentine's Day poll

WILL you be working with one – or more – partners tonight?

Our exclusive Valentine's Day sex survey shows that ONE IN TEN of us are in a polyamorous relationship.

Polyamory seems to have really taken off, with a surprising number of Brits willing to spend Valentine's Day with more than one partnerCredit: News Group Newspapers Ltd

Of those, 74 percent will spend the most romantic day of the year with more than one partner.

And 81 percent buy presents for all their loved ones, making it a pretty expensive time of year.

We surveyed 2,000 men and women aged 18 and over to find out how Sun readers will spend V-Day.

Polyamory is a non-monogamous relationship style in which people mutually agree to have multiple sexual or romantic relationships.

While it's no secret that non-monogamy is on the rise, our research shows just how popular it is becoming.

Belfast is the British capital of polyamory, with almost a quarter (22 percent) of the population in an unconventional relationship.

London follows with 15 percent.

And Birmingham and Sheffield come in joint third with 14 percent.

The country's threesome hotspot is Manchester, with 86 percent of the population claiming to have had a threesome.

Three quarters (75 percent) of pleasure seekers in Leeds have also enjoyed a threesome, putting it in second place.

Is Manchester the trio capital of Britain?

In third place comes Southampton, where 67 percent have committed to this.

Although our appetite for monogamy seems to be waning, we are still a nation of romantics when it comes to Valentine's Day; 63 percent of respondents say they will celebrate.

And 38 percent expect to be lucky tonight.

More than half of them expect it to be more adventurous sex.

Sun sex expert Georgette Culley reveals all the challenging results – and two readers share their wildest sex secrets. . .

Just over a third of us won't be in the mood to celebrate Valentine's Day this year

A tenth of Brits are polyamorous, and most of them will plan for multiple partners

Many Brits expect their partners to pop the question, but it seems many aren't making their own plans to propose

We reveal the ins and outs of how Brits having affairs will spend Valentine's Day

And we look at the number of Brits who want a threesome tomorrow

Nearly seven in ten have used a sex toy on Valentine's Day

London tops the list twice in terms of statistics of people having a less than conventional Valentine's Day

'SEX TOYS REPLACE MAN'

GYM teacher Lucy Entwistle has been married for 18 months – but her husband has only had one orgasm.

So the 36-year-old, from Darwen, Lancs, turns to her sex toys, which she uses in secret to avoid hurting his feelings.

Lucy Entwhistle admits she secretly uses sex toys as her husband has only had one orgasm

She says: “I wait until he is deeply asleep, then I sneak into the bathroom and have fun with my vibrators.

'Or I'll wait until he's out with the boys.

“He doesn't suspect anything and thinks he's great in bed.

'I don't have the heart to tell him otherwise. . . ”

'NIGHT TO PULL GUY – OR COUPLE'

EMMERALD Barwise is a big fan of Valentine's Day – and threesomes.

The Mancunian hairdresser says: “I'm not surprised that Manchester is the trio capital of Britain. We northerners are wild.

Emmerald Barwise is no surprise that Manchester is the threesome capital of Britain - and recalls a naughty night she spent with a married couple last year — Emmerald Barwise is no surprise that Manchester is the threesome capital of Britain – and recalls a naughty night she spent with a married couple last yearCredit: Olivia West – The Sun

“As a bisexual single woman, I love V-Day and have never spent it alone.

“It's a great night to go out and hike – whether that's one person or two people at a time.

“Last year I went to a club and met a married couple there.

“We finally hit it off and went back to their hotel room for some hot sex.

“It was fun, naughty and exciting and I hope I will have the same luck this year.

'I've also met husbands for a quick one-night stand when they were fighting with their significant other.

“Fall Day is the best time of the year for me.”