I gave a piece of my work, which I was rather happy with myself (although, that's just me), to a friend of mine for critique earlier today. He said that I tended to 'tell' far too much rather than 'show'. I usually try very hard to show what I am describing without telling the reader straight out, but sometimes I find this near impossible. For example, I described a lady giving birth as having a face 'contorted in what some might think fury'. He said that this was telling the reader rather than showing. However, I found it quite difficult to describe the face in a 'showing' manner. Can telling always be avoided, and should it be avoided at all costs?