Fantastic portraits full of details for the artist to capture and 1 celebrity. Oliver Sin fills his social media page with charcoal drawings of models and references. They have very expressive faces, even when they are not expressing any particular emotion. Many of us tend to make choices in a very binary way. Yes/No On/Off. If you have a look at these drawings, you don't automatically say that the people in them are happy. Therefore if they are not happy they must be sad or angry? There are…