There weren’t many members of The Beatles who were as insecure about themselves as John Lennon was. He was already a bit more confrontational when he dished out some of his trademark wit in interviews, but even when he got up to the microphone to sing, there were moments where he seemed more uneasy with what he was doing every single time he had to open himself up. Trying to get to that level of vulnerability wasn’t going to be easy for him, bu…