We all buy clothes, but no two people shop the same. It can be a social experience, and a deeply personal one; at times, it can be impulsive and entertaining, at others, purpose-driven, a chore. Where do you shop? When do you shop? How do you decide what you need, how much to spend and what’s “you”? These are some of the questions we’re putting to prominent figures in our column “ How I Shop .” Here's a fun fact about Anok Yai: She's a painter. Yes, as in she sits in front of a canvas and creates paintings. There is a catch, though: "Girl, I'm one of the slowest painters that I know," she says laughing over a video call. "I always need someone to be like, 'Go paint, paint, paint.'" But to give her some grace, she is one of the busiest models in the business right now. The supermodel has walked the runway for nearly every top designer, including Gucci , Chanel , Lanvin , Coperni , Saint Laurent , Balenciaga , Versace, Fendi and counting.…