Channel 4's Open House: The Great Sex Experiment has returned for a second series.
The last few weeks have seen new couples join a special retreat to see if opening up their relationship is a viable option. They meet other open-minded couples and individuals - and are free to do as they please, so long as all parties are on the same page.
As expected, it hasn't exactly gone smoothly for most. Some have been forced to confront insecurities within their relationship - for one, seeing his girlfriend so much as flirt with another man was too much to handle.
