That was how the converastion started. I came home one night and he was drunk and had just bought it and was just saying 'The Beatles are just amazing' and I was going 'Yeah they are aren't they?' but all the while he was in a world where this was their debut album and I was in the 'regular' world where it's quite clear that it's a compilation. Long after this, I asked 'Well didn't you read the sleeve?' But he thought the whole thing was an ironic mock-up.
Even more enjoyable was the time when another friend who was more into The Smiths than anything else, picked up Mark Shipper's 'Paperback Writer' and proceeded NOT to realise it was a spoof. He was reading it intently in the corner while the rest of us (in a band at the time) worked on home studio stuff. On day four he said 'I can't believe they called their first album 'We're Gonna Change The Face of Pop Music Forever'
The rest of us looked at each other and tried to sense his situation but he was in a parallel universe of exquisite ignorance.
He was, of course, gutted by the reality we revealed and as far as I know has developed no further interest in The Beatles.