Europe's biggest sex festival is taking place once again this weekend - and comes with a long list of dos and don'ts for those attending.
For the next few days, the site in Malvern, Worcestershire, will be home to all sorts of amorous activity and raunchy entertainment as swingers from across the country and beyond attend.
Guests have to agree to a strict set of conditions and adhere to the festival's privacy guidelines meaning they cannot use their phones in the venue, GloucestershireLive reported .
The site is a closely-guarded secret and ticket holders who pay £170 for couples are only told 48 hours before the festival gets underway.
Large sex hammocks, big enough for several people to swing on, have been placed in the centre of the site for attendees to relax on.
Several publicly-available guides on the Swingfields website which provide a bit more information about what guests want to know:
Wristbands
Like most festivals paying guests are issued wristbands on arrival.
But unlike most other festivals, these different-coloured wristbands here tell others what that person's sexual preference is.
Dogs
No dogs are allowed at the festival because the site is located on a farm.
Dress code
It might come as a small surprise that the venue imposes a dress code on attendees.
The organisers say: "Although the dress code will be very relaxed we will expect bottom halves at least to be covered whilst in the festival arena."
Phones
There has been a crackdown on the use of phones following a change in policy in 2015.
The organisers say: "To prevent any invasion of privacy we ask that NO PHONES are used in the festival area whatsoever.
"You may use phones in the privacy of your own tents ONLY. Any phones seen being used other than in the car parking area will be confiscated until you leave."
Single men
Single men can attend the festival - but will need a bit of luck to get in.
Just 10 per cent of the tickets go to unattached males.
They will need at least four people to verify their identity and suitability before being granted access.
The website says: "We welcome single gentlemen, and put a limit of 10% of the total guests, so tickets sell quickly.
"However, we do request that before booking you email us to provide your profile name on lifestyle sites so we can cross check your profile pictures and verifications.
"This is to ensure you are not a member of the press, and have been suitable verified by at least four different people.
"It is important to ensure the security of our female guests and to make sure our gentlemen guests understand the basis of the lifestyle as being respectful and polite.
"Failure to follow this process will render your ticket invalid until these requirements are met, and tickets once purchased are non refundable."
There is also a glossary of terms issued to festival-goers, including the meanings of 'full swap', 'bull', 'unicorn', and 'hot wife' - among many many more.
A 'hot wife' refers to a woman who has freedom in her marriage to pursue sexual relationships with men other than her husband.
A 'bull' refers to a sexually-dominant man who has sex with other men's wives - usually with their counterpart's permission.
'Unicorns' are single women who are interested in sex with other couples but are considered quite rare, hence the nickname.
'Full swaps' are couples who exchange partners during encounters.
