The UK's top 10 fetishes, kinks and unusual sexual practices, based on a nationally representative survey specially commissioned by Channel 4 and conducted by YouGov. The programme meets ordinary people from across the UK who get up to some jaw-dropping and eye-watering activities in the bedroom, with experts including psychotherapist Philippa Perry and Belgian sexologist Goedele Liekens explaining where unusual sexual desires come from, and why there's no such thing as normal.