“Strawberry Fields Forever/Penny Lane” is a 2-sided Beatles hit with both songs based upon childhood memories. But I think “Help!” and “I’m Down” can also been thought of as a single with both sides having related ideas.
Both songs are about feeling bad, but I think John’s is more heartfelt. It’s almost a follow-up to “I’m a Loser,” while Paul’s song seems more like the flip-side it is.
John’s sons were born to two different, and very different, mothers. They had different relationships with their father, and they have different memories of him, but with similar feelings.
https://youtu.be/Bh87SeH1y8g