After years behind the microphone, retired ABC radio host Geoff Hutchison had met more than his fair share of grumps. Determined not to become one himself, he penned a book - How Not to Become a Grumpy Old Bugger, which explores why ageing so often brings out the curmudgeon in Australian men, and what could be done to resist the slide into grumpiness. Tune in to hear the full conversation.