On 28 August 1964, Bob Dylan was introduced to the Beatles by a mutual friend, the writer Al Aronowitz, at New York's Delmonico Hotel. Upon arriving at the Beatles' suite, Dylan suggested they have a smoke. The Beatles spent the next few hours in astounded hilarity, while Dylan looked on with amusement.
While touring in Paris, Paul McCartney tumbled out of bed one morning and found the tune to "Yesterday" in his head. At first, he thought he must have heard it somewhere before. He used the working title "Scrambled Eggs" until he could figure out the lyrics.
Paul McCartney actually wrote "Got to Get You Into My Life" as an ode to Marijuana. He says, "I kind of liked marijuana and to me it seemed it was mind-expanding, literally mind-expanding. So 'Got To Get You Into My Life' is really a song about that. It's not to a person, it's actually about pot."