It was a strange feeling. Suddenly, I was asked to become the subject of someone else's art-making. And not just to sit for a portrait in the usual sense of the word. Portraits are usually fairly straightforward affairs, either commissions or records of friends and colleagues. Artists tend to use their fellow artists as subjects because they esteem them, share creative time together (such as Edouard Manet painting Monet working in his studio-boat) or even, sometimes, because they need an inexpensive model. But my request to be the subject was a little different, I learned.