Two weeks into the eight-week experiment and the experts focus on the couples' communication styles - both verbal and non-verbal. John takes the couples to an archery range. This may seem like tempting fate, but he wants to show them how focusing on the positives rather than the negatives pays dividends in both archery and relationships. Desiree lines up an unorthodox communication lesson for Alison and Paul in an Aikido studio, where they learn that the principle behind the martial art - 'yield to win' - is also at the heart of successful relationships. But when Desiree discovers that it's a challenge for Alison to even hold Paul's hand, the scale of the barriers the experts face becomes clear. Paula and Steve are shocked to learn from Anna-Louise that 85% of all communication is non-verbal, and they put the research to the test by identifying happy couples randomly from their body language, and discovering their secrets for a happy relationship.