Zayn Malik, Liam Payne, Louis Tomlinson, Niall Horan and Harry Styles from One Direction pose as they attend the book signing of One Direction’s book ‘Where We Are’ in 2013. Photograph: Karwai Tang/WireImage

One Direction’s Liam Payne last week dropped Stripped Down, his debut single, which can best be described as something that certainly exists. That is(...)