Bare with him. Harry Styles covers the September issue of W magazine with his abs and ink front and center. The Grammy winner, 32, posed for photographer David Sims in a custom Miu Miu leather jacket worn open and a pair of Calvin Klein Collection underwear with “Disco” on the waistband — a nod to his fourth studio album, “Kiss All the Time. Disco, Occasionally.” The “shirt optional” theme carried throughout the shoot, with Styles’ longtime collaborator Harry Lambert styling the singer in a Chanel chainmail jacket over jeans and a Dior suit with only a cross pendant against his chest. Inside the issue, Styles opened up to writer-director…