Frisson is a term used to describe a intense and pleasant sensation of chills or shivers that some people experience while listening to certain types of music, watching a movie or a dramatic play, or reading a book. It is not rare to have frisson - in fact, research suggests that about 50% of people have experienced frisson at some point in their lives. However, the intensity and frequency of frisson can vary from person to person, and some people may be more susceptible to experiencing frisson than others. The exact reasons why some people experience frisson and others do not are still not fully understood, but it is believed to be linked to how the brain processes and responds to emotionally stimulating stimuli.