The average person spends a third of their life in bed. Lucky them. Of course, not all of that is sleeping. There’s also, y’know, that (*blushes*). And, more likely, ignoring the growing stack of bedside books in favour of staring at your phone. But the bed is a great unifier – not that we’re all in the same bed, you understand. The point being, if you’re about to spend some 26 years doing something, you’ll probably want to dress for it. Which, once you tot it up, makes pyjamas some of the best value pieces of clothing that you can own, cost per wear.