Wow, is this what the Paul Simon song called Kodachrome is actually about? (Please don't make fun of me if this was already a known thing.)
There's nothing in the Wikipedia entry that contradicts the possibility, though. Both could be true, with illicit details elided from the official telling.
Still I'm choosing to believe in innocent origins.
https://en.wikipedia.org/wiki/Lucy_in_the_Sky_with_Diamonds
you can't help wondering though...
That's true but at least we have a bit more to go on there (if not specifically about Lucy in the Sky) - I can't dig up the original reference but it's a famous enough story to paste from a random google search result:
John told Derek Taylor that when he and Paul dropped acid together they “just stared into each other’s eyes saying ‘I know, man’ and laughing”