“From late 1980 to mid 1982, Young spent much of his waking hours carrying out a therapy program for his young son, Ben, who was born with cerebral palsy and unable to speak. Neil disclosed to almost no one at the time that he was doing so, or that the repetitive nature of the songs on both the previous album, Re-ac-tor, and this one related to the exercises he was performing with Ben.”
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(Source: https://www.youtube.com/)