I read somewhere that an extraordinary percentage of home buyers regard a dishwasher as an absolute necessity when they are considering a prospective purchase. I don’t suppose it’s surprising; everyone is keen to cut down on labour intensive activities and washing-up is one of the least popular household chores. But does having a dishwasher stack up as a positive addition to a household? I can only talk about the experiences of a relatively elderly two-person household and accept that things might be different for a family of 6. When people reach our age, their diet changes. No longer do we have complicated dinners which need multiple cooking utensils and mixing dishes. We’re more likely to take something from the freezer and cook it in the plastic dish it came in. Or we will have a toasted sandwich or bowl of soup. A normal meal in our house might produce two dirty plates, 2 knives, 2 forks and, if I’m allowed to ha...