The song confirmed Charles Manson's belief that the Beatles were talking directly to him, by virtue of one of his followers, Susan Atkins, having already been nicknamed Sadie Mae Glutz. Many of the tracks from The White Album
" for example) were interpreted by Manson as messages directed to him.
In the Anthology
book when The Beatles were talking about Manson, John Lennon was quoted as saying, "All the other fellows had some 'influence' on Manson, but not me I didn't do nothing," but Sadie was the nickname for Susan Atkins (Sadie Mae Glutz) which did contribute to Manson's belief that the Beatles were singing about him and his "Family." (thanks, Breanna - Henderson, NV)