Read this: Paul McCartney clears up that graveyard tale and breaks down the writing process of "Eleanor Rigby"
He's just as confused as fans about why Eleanor Rigby's picking up rice at someone else's wedding

Paul McCartney is set to publish his whopping 900-page book, The Lyrics, that explains the stories behind many of his biggest Beatles songs and his solo material on November 2. Weeks before its arrival, he shared an excerpt with The New Yorker that delves into the making of The Beatles classic “Eleanor Rigby.”
All the lonely people, where do they all come from? In Eleanor Rigby’s case, she came from Macca’s childhood. He explained that the song about the lonely elderly woman is based on an “old lady that [he] got on with very well.”
“I would go around her house, and not just once or twice. I found out that she lived on her own, so I would go around there and just chat, which is sort of crazy if you think about me being some young Liverpool guy,” he wrote.
“Later, I would offer to go and get her shopping. She’d give me a list and I’d bring the stuff back, and we’d sit in her kitchen. I still vividly remember the kitchen, because she had a little crystal-radio set. That’s not a brand name; it actually had a crystal inside it. Crystal radios were quite popular in the nineteen-twenties and thirties. So I would visit, and just hearing her stories enriched my soul and influenced the songs I would later write.”