Great question! There's actually a few ways to look at it.The song is from Pink Floyd's 1979 album The Wall, in which an archetypal rock star named "Pink" grows increasingly isolated as a result of traumatic events of his past and present. These events lead to his building a metaphorical "wall" to separate him from the outside world, using these events as "bricks". The song "Comfortably Numb" shows his isolation after he builds the wall.Primary songwriter Roger Waters and director Alan Parker approached the film project "The Wall" as a feature-length music video, with the songs telling the story (which is fleshed out quite a bit more with the accompanying visuals). During "Comfortably Numb", Pink is still isolated, but we also observe him shaving his head, eyebrows, chest-hair, etc. This s