My sixteen-year-old son, Roshan, stands in front of me holding up a white thermal vest.
"Spark joy?" he asks.
A few months ago, that would have been an odd thing to say. That was before Marie Kondo, tidying guru and diminutive powerhouse, took the world by storm. By which I mean: thanked it kindly, gave it a good shake, folded it into equal thirds, stacked it neatly on its side in a pretty box and put it in a drawer.
The former Shinto-shrine maiden from Tokyo shot to fame in 2014, when her book, Jinsei ga Tokimeku Katazuke no Maho, was published in English as The Life-Changing Magic of Tidying Up. In the seven years since the Japanese book first came out, Kondo's titles have sold over 10 million copies worldwide, in more than 40 languages. The recent Netflix series Tidying Up with Marie Kondo has also been a massive hit. Clearly, she's on to something.