Should I flush my goldfish down the loo? - Joe Joseph

I returned home to discover that one of my goldfish was very unwell. I extracted it from the bowl, to prevent it infecting the rest, and put it into isolation in a water-filled jar, hoping that it might recover. But when my partner came home, he just wanted to flush the poorly goldfish down the lavatory. Having discovered that our views on the sanctity of life are so far apart, should I leave him?

When visiting tourist sites, I like to wander around, taking it all in. But my enjoyment is constantly interrupted by people taking photographs. Am I duty bound to keep watching them closely, so that I avoid walking in front of them during a snapshot, or should I let them do it at their own risk?

When I was buying a camera, the salesman demonstrated my chosen model and totted up the extras, which included an extended warranty. We had to have this, he said, because just before it expired we could stomp on the camera and claim another: manufacturers know that customers do this and factor it into the price. Should we have reported him to the manager? Or the manufacturer?

I ordered several cases of wine from the supermarket and they delivered one too many. Can I drink it without guilt?

These dilemmas and many more make up this hilarious, eye-opening collection by Joe Joseph, 'modern morals' columnist for the Times . From dodging train fares to the etiquette of Internet dating, Joe bravely leads us through today's ethical minefield with wit and irreverence - a must-have guide for any modern moralist.