'Tis the season of Christmas Parties... And if you're into casual sex with coworkers, you might want to stay away from the sales team!

20% of Brits admit they hooked up with a coworker at their office Christmas party, and people from the sales department are considered most likely to do the deed.

The results come from a survey conducted by OnePoll on behalf of independent health platform Patient, as part of a campaign by charity FPA.

The study looked at survey answers by 2,000 UK office workers ranging from 18 to 65 years old. It was carried out across the UK between 8 and 14 November 2017.

Breaking down the answers by sectors, about 17% of people consider the sales team to be most likely to be hitting their targets and engaging in casual sex during office festivities.

The customer service department got 11.5% of the vote, as most likely to have a fling – insert refund joke here.

Those considered least likely to hook up are found in the legal department, scoring 2% of votes. Perhaps they had some paperwork to catch up on.

The research reveals that men are 30% more likely to hook up with a coworker at their office Christmas party and 40% more likely to catch an STl from a coworker than women.

Your Secret Santa could give you an STI for Christmas

18-to-24-year-olds are 6 times more likely to catch an STI from a colleague than their 45- to 54-year-old counterparts. Hiwevers note 55-65 year olds are the most likely group to have hooked up with a colleague or know someone who had.

If an STI is contracted, 13% wouldn't tell the coworker they had had sex with. But 13% would talk to their manager or another coworker about it. Only 8% would mention it to HR, and 4% would contact their office's legal team.

29% of people wouldn't be worried about getting chlamydia from casual sex, even though it's the most common STI in the UK. 25% of people wouldn't be worried about catching HIV.

The aim of the research is to encourage people to practice safe sex rather than shun those who engage in casual sex.

"Whilst the festive season is always a great time to let your hair down, it's important that people remain aware of the risk of unprotected sex," says FPA's executive chief, Natika Halil.

"We would advise anyone who has had unprotected sex with a colleague or someone else to get tested for STIs as soon as possible," she adds.

The study also shed light on which regions of the UK people were most likely to getting it on during the Christmas season.

In first place was Northern Ireland, where 27% of people admit having hooked up with someone at their office Christmas Party.

The West Midlands have the highest rate of people catching STIs from coworkers – 20%. But in the South West, only 6% have or know someone who has.

If coworkers are definitely not your thing, you might want to consider moving to the East Midlands, where only 9.5% of people engage in casual sex in the workplace.