Given the task definition and input, reply with output. Given the background description of some cooking related query, summarize the question into a title

Whenever I go to a BBQ and sausages are cooking, the chef will always prick the sausages while they are cooking. I have no idea what this does, I assume it's to get the fat out, however I recently read that you should never prick sausages as it results in them being dry inside?So my question is, should I prick sausages with a fork or knife during cooking?
Should I prick sausages during cooking?