In this episode, Belgian sexologist Goedele Liekens advises a sexually adventurous couple on how to make their sex life more intimate - by slowing things down. She introduces another couple to CAT, which helps lovers reach orgasm. Goedele also coaches another couple on role reversal, with the female taking control in the bedroom. And a specially commissioned survey gives the lowdown on Britain's attitudes to unfaithfulness and how technology and mobile apps are transforming our sexual habits.