Monogamous relationships are no longer regarded as the only option, as more people take a more flexible approach to fidelity - but can an open relationship ever really work?
Whisper has compiled brutally honest confessions from people in open marriages and relationships - and it seems it's not always plain sailing.
Many non-monogamous people have found that the biggest problem they face is the pressure of outside opinion - as friends and family struggle to understand their choice.
One user said that their married friends beg them to settle down with just one significant other, while another girl revealed her mother suspected her of having affairs behind her boyfriend's back.
Others struggled with finding like-minded partners, including one man who said he was desperate to find a girlfriend to date alongside their wife.