George Harrison often had a hard time working with the two of the greatest songwriters. Since John Lennon, Paul McCartney, and the group’s producer, George Martin, hardly gave him the time of day and let him come forward with his songs, George kept most of them to himself. Meanwhile, he tried as hard as possible to help them form their tunes into hits. During an interview with Guitar World, George explained what it was like working with John in the studio. He said John had a hard time figuring out what he wanted to say most of the time.
Source: cheatsheet.com