The song 'I Can't Dance' by Genesis portrays a sense of self-awareness and insecurity, where the protagonist feels inadequate in various aspects like dancing, talking, and singing. The lyrics depict encounters with different people, highlighting a lack of confidence and a feeling of being an outsider. The metaphorical references to dancing and singing symbolize the struggle with self-expression and fitting in, while the act of 'selling everything' could represent putting on a facade or trying to conform to societal expectations despite feeling out of place.