What’s the one question you can ask anyone… a group sitting round your dinner table… friends relaxing outside on a picnic… your workmates at coffee break… colleagues round the office water cooler? A question that offends no-one, crosses no personal boundaries? A question that interests almost everyone you ask, that sets eyes alight with excitement? A question that produces a huge variety of answers, is never offensive, and you can ask men or women, children, or sometimes strangers?