"David Bowie was with us one night. We were all such students and fans of his and we asked his advice on The Fly. He said, 'Do you really want me real advice?'. We said, 'Of course!' He said, 'Re-record it.' He was right but we had run out of time. It took us fifteen years to really get it right live."
- Bono on The Fly
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The Popmart stage design, which looked like a supermarket, appealed to Bono as a supermarket, with its myriad choices and temptations, could function as a metaphor for U2's songs, as they often deal with the struggle between desire and faith.