Well, the songs meaning is about a serial killer. Paul stated that he just wrote the song about all these people that he never knew. Rumour has it that the part where Paul laughs or chuckles is because John mooned him. And yes, Paul rerecorded the song with the boys so many times that they hated it. I believe it was John that actually disliked the song to begin with, but I dont have it in front of me. Personally, its not one of my favorites either, though its OK.