zack, what kind of goofy question is that?! (just teasing) ;-)... the Beatles, all four of them, were screaming out these great songs..with john usually "screaming" the loudest!!! stay safe and make it a great 2013...;-)
John. I saw a documentary on it once and I believe it was Paul talking. He said they recorded it late at night and did many takes. He said johns voice was just getting ripped up by it but that it made the song better. The raspy sound was better apparently.