This year a trend emerged that was genuinely bewildering to a lot of middle-class people. It started with our pre-teens. They started slumping around the house looking like giant babies. It turned out they were emulating full-grown celebrities who were actually going out of their house dressed like this. And then it caught on among apparently sensible adults. The onesie is unquestionably awful and undignified. A huge babygrow, often in terrible prints. But people really seem to love them. Apart from great swathes of MCs for whom too-comfortable clothing is a matter of concern. Let’s hope society grows out of its onesie obsession next year.