Joe Friedman, who grew up with deaf parents, reflects on what it means to hear. As a young psychotherapist, treating one particularly challenging client taught him the difference between listening that was only "skin deep" and really hearing someone else's pain. It helped him to lose his "deaf ears". "I assumed, like my parents, that being Hearing meant you could communicate, listen and hear - naturally. On reflection, of course, this is obviously idiotic. We all know people whose ears function perfectly well, but who don't hear a word you say!"

Presenter: Olly Mann.