Even as one of rock ‘n’ roll’s best guitarists, George Harrison sometimes turned to the piano to write his songs. The Beatle relied on ivory keys to give him a fresh sound when writing “Old Brown Shoe” and “Something,” not tight strings.
In his 1980 memoir, I Me Mine, George said he wrote “Old Brown Shoe” on the piano. Although, he wasn’t familiar with the instrument.
He wrote, “‘Old Brown Shoe.’ I started the chord sequences on the piano (which I don’t really play) and then began writing ideas for the words from various opposites: ‘I want a love that’s right/ But right is only half of what’s wrong.’ Again it’s the duality of things–yes-no, up-down, left-right, right-wrong, etc.”
Source: Hannah Wigandt/cheatsheet.com